Сповіщення і попередження NOAA SWPC

Національний центр прогнозування метеорологічної погоди (NOAA SWPC) є офіційним агентством космічної погоди США, яке оперативно здійснює оповіщення про її зміни. Нижче ви знайдете останні повідомлення про погоду в космосі, прогнози, часові інтервали і попередження, від NOAA SWPC.

субота, 12 квітня 2025

22:45 UTC

Space Weather Message Code: WARK04
Serial Number: 4920
Issue Time: 2025 Apr 12 2245 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4919
Valid From: 2025 Apr 12 1636 UTC
Now Valid Until: 2025 Apr 13 0900 UTC
Warning Condition: persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

22:20 UTC

Space Weather Message Code: WARK05
Serial Number: 2017
Issue Time: 2025 Apr 12 2220 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Apr 12 2220 UTC
Valid To: 2025 Apr 13 0600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:46 UTC

Space Weather Message Code: ALTK04
Serial Number: 2544
Issue Time: 2025 Apr 12 1746 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Apr 12 1746 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:36 UTC

Space Weather Message Code: WARK04
Serial Number: 4919
Issue Time: 2025 Apr 12 1636 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Apr 12 1636 UTC
Valid To: 2025 Apr 13 0300 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

07:03 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3451
Issue Time: 2025 Apr 12 0703 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3450
Begin Time: 2025 Apr 05 1225 UTC
Yesterday Maximum 2MeV Flux: 3362 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

пʼятниця, 11 квітня 2025

23:41 UTC

Space Weather Message Code: WARK04
Serial Number: 4918
Issue Time: 2025 Apr 11 2341 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4917
Valid From: 2025 Apr 10 2243 UTC
Now Valid Until: 2025 Apr 12 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

17:55 UTC

Space Weather Message Code: WARK04
Serial Number: 4917
Issue Time: 2025 Apr 11 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4916
Valid From: 2025 Apr 10 2243 UTC
Now Valid Until: 2025 Apr 11 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:08 UTC

Space Weather Message Code: WATA20
Serial Number: 1036
Issue Time: 2025 Apr 11 1408 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Apr 12: G1 (Minor) Apr 13: None (Below G1) Apr 14: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:34 UTC

Space Weather Message Code: WARK04
Serial Number: 4916
Issue Time: 2025 Apr 11 0534 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4915
Valid From: 2025 Apr 10 2243 UTC
Now Valid Until: 2025 Apr 11 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

04:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3450
Issue Time: 2025 Apr 11 0459 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3449
Begin Time: 2025 Apr 05 1225 UTC
Yesterday Maximum 2MeV Flux: 3362 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

четвер, 10 квітня 2025

22:59 UTC

Space Weather Message Code: WARK05
Serial Number: 2016
Issue Time: 2025 Apr 10 2259 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Apr 10 2300 UTC
Valid To: 2025 Apr 11 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

22:46 UTC

Space Weather Message Code: ALTK04
Serial Number: 2543
Issue Time: 2025 Apr 10 2246 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Apr 10 2247 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

22:42 UTC

Space Weather Message Code: WARK04
Serial Number: 4915
Issue Time: 2025 Apr 10 2242 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Apr 10 2243 UTC
Valid To: 2025 Apr 11 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:33 UTC

Space Weather Message Code: WARK04
Serial Number: 4914
Issue Time: 2025 Apr 10 0833 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4913
Valid From: 2025 Apr 10 0107 UTC
Now Valid Until: 2025 Apr 10 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

07:56 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3449
Issue Time: 2025 Apr 10 0756 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3448
Begin Time: 2025 Apr 05 1225 UTC
Yesterday Maximum 2MeV Flux: 3893 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

01:41 UTC

Space Weather Message Code: ALTK04
Serial Number: 2542
Issue Time: 2025 Apr 10 0141 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Apr 10 0141 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

01:08 UTC

Space Weather Message Code: WARK04
Serial Number: 4913
Issue Time: 2025 Apr 10 0108 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Apr 10 0107 UTC
Valid To: 2025 Apr 10 0900 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

середа, 9 квітня 2025

08:39 UTC

Space Weather Message Code: WARK04
Serial Number: 4912
Issue Time: 2025 Apr 09 0839 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4911
Valid From: 2025 Apr 07 2022 UTC
Now Valid Until: 2025 Apr 09 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:38 UTC

Space Weather Message Code: WARK05
Serial Number: 2015
Issue Time: 2025 Apr 09 0838 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2014
Valid From: 2025 Apr 08 1436 UTC
Now Valid Until: 2025 Apr 09 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:21 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3448
Issue Time: 2025 Apr 09 0521 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3447
Begin Time: 2025 Apr 05 1225 UTC
Yesterday Maximum 2MeV Flux: 10269 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

01:51 UTC

Space Weather Message Code: ALTK05
Serial Number: 1743
Issue Time: 2025 Apr 09 0151 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 09 0145 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

вівторок, 8 квітня 2025

20:56 UTC

Space Weather Message Code: WARK05
Serial Number: 2014
Issue Time: 2025 Apr 08 2056 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2013
Valid From: 2025 Apr 08 1436 UTC
Now Valid Until: 2025 Apr 09 0900 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:56 UTC

Space Weather Message Code: WARK04
Serial Number: 4911
Issue Time: 2025 Apr 08 2056 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4910
Valid From: 2025 Apr 07 2022 UTC
Now Valid Until: 2025 Apr 09 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

15:01 UTC

Space Weather Message Code: ALTK05
Serial Number: 1742
Issue Time: 2025 Apr 08 1501 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 08 1459 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:41 UTC

Space Weather Message Code: WARK04
Serial Number: 4910
Issue Time: 2025 Apr 08 1441 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4909
Valid From: 2025 Apr 07 2022 UTC
Now Valid Until: 2025 Apr 08 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:36 UTC

Space Weather Message Code: WARK05
Serial Number: 2013
Issue Time: 2025 Apr 08 1436 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Apr 08 1436 UTC
Valid To: 2025 Apr 08 2100 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

06:14 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1410
Issue Time: 2025 Apr 08 0614 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Apr 08 0553 UTC
Estimated Velocity: 456 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

05:02 UTC

Space Weather Message Code: WARK04
Serial Number: 4909
Issue Time: 2025 Apr 08 0502 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4908
Valid From: 2025 Apr 07 2022 UTC
Now Valid Until: 2025 Apr 08 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

04:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3447
Issue Time: 2025 Apr 08 0459 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3446
Begin Time: 2025 Apr 05 1225 UTC
Yesterday Maximum 2MeV Flux: 17878 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

понеділок, 7 квітня 2025

20:39 UTC

Space Weather Message Code: ALTK04
Serial Number: 2541
Issue Time: 2025 Apr 07 2039 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Apr 07 2039 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

20:22 UTC

Space Weather Message Code: WARK04
Serial Number: 4908
Issue Time: 2025 Apr 07 2022 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Apr 07 2022 UTC
Valid To: 2025 Apr 08 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

04:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3446
Issue Time: 2025 Apr 07 0459 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3445
Begin Time: 2025 Apr 05 1225 UTC
Yesterday Maximum 2MeV Flux: 9243 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

неділя, 6 квітня 2025

23:58 UTC

Space Weather Message Code: WARK04
Serial Number: 4907
Issue Time: 2025 Apr 06 2358 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4906
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 07 0559 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:55 UTC

Space Weather Message Code: WARK04
Serial Number: 4906
Issue Time: 2025 Apr 06 0555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4905
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 06 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3445
Issue Time: 2025 Apr 06 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3444
Begin Time: 2025 Apr 05 1225 UTC
Yesterday Maximum 2MeV Flux: 2350 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

01:55 UTC

Space Weather Message Code: WARK05
Serial Number: 2012
Issue Time: 2025 Apr 06 0155 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2011
Valid From: 2025 Apr 05 2005 UTC
Now Valid Until: 2025 Apr 06 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

01:52 UTC

Space Weather Message Code: ALTK05
Serial Number: 1741
Issue Time: 2025 Apr 06 0152 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 06 0150 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

субота, 5 квітня 2025

20:33 UTC

Space Weather Message Code: WARK06
Serial Number: 572
Issue Time: 2025 Apr 05 2033 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Apr 05 2032 UTC
Valid To: 2025 Apr 06 0300 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:20 UTC

Space Weather Message Code: ALTK05
Serial Number: 1740
Issue Time: 2025 Apr 05 2020 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 05 2020 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:06 UTC

Space Weather Message Code: WARK05
Serial Number: 2011
Issue Time: 2025 Apr 05 2006 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Apr 05 2005 UTC
Valid To: 2025 Apr 06 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:56 UTC

Space Weather Message Code: WARK04
Serial Number: 4905
Issue Time: 2025 Apr 05 1756 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4904
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 06 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

12:44 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3444
Issue Time: 2025 Apr 05 1244 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025 Apr 05 1225 UTC
Station: GOES16




Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

04:05 UTC

Space Weather Message Code: ALTK05
Serial Number: 1739
Issue Time: 2025 Apr 05 0405 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 05 0405 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

03:00 UTC

Space Weather Message Code: ALTK06
Serial Number: 623
Issue Time: 2025 Apr 05 0300 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Apr 05 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

02:11 UTC

Space Weather Message Code: WARK06
Serial Number: 571
Issue Time: 2025 Apr 05 0211 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Apr 05 0210 UTC
Valid To: 2025 Apr 05 1200 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

00:51 UTC

Space Weather Message Code: ALTK05
Serial Number: 1738
Issue Time: 2025 Apr 05 0051 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 05 0051 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

00:49 UTC

Space Weather Message Code: WARK05
Serial Number: 2010
Issue Time: 2025 Apr 05 0049 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Apr 05 0050 UTC
Valid To: 2025 Apr 05 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

00:47 UTC

Space Weather Message Code: WARK04
Serial Number: 4904
Issue Time: 2025 Apr 05 0047 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4903
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 05 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

пʼятниця, 4 квітня 2025

23:19 UTC

Space Weather Message Code: ALTK05
Serial Number: 1737
Issue Time: 2025 Apr 04 2319 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 04 2317 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:20 UTC

Space Weather Message Code: WARK05
Serial Number: 2009
Issue Time: 2025 Apr 04 1420 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2008
Valid From: 2025 Apr 03 1943 UTC
Now Valid Until: 2025 Apr 04 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:20 UTC

Space Weather Message Code: WARK06
Serial Number: 570
Issue Time: 2025 Apr 04 1420 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Apr 04 1418 UTC
Valid To: 2025 Apr 04 2100 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

14:20 UTC

Space Weather Message Code: WARK04
Serial Number: 4903
Issue Time: 2025 Apr 04 1420 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4902
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 05 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

13:07 UTC

Space Weather Message Code: ALTK05
Serial Number: 1736
Issue Time: 2025 Apr 04 1307 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 04 1307 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:49 UTC

Space Weather Message Code: WARK05
Serial Number: 2008
Issue Time: 2025 Apr 04 0549 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2007
Valid From: 2025 Apr 03 1943 UTC
Now Valid Until: 2025 Apr 04 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:48 UTC

Space Weather Message Code: WARK04
Serial Number: 4902
Issue Time: 2025 Apr 04 0548 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4901
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 04 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

00:01 UTC

Space Weather Message Code: ALTK05
Serial Number: 1735
Issue Time: 2025 Apr 04 0001 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 03 2359 UTC
Synoptic Period: 2100-0000 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

четвер, 3 квітня 2025

20:02 UTC

Space Weather Message Code: ALTK05
Serial Number: 1734
Issue Time: 2025 Apr 03 2002 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Apr 03 2002 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

19:43 UTC

Space Weather Message Code: WARK05
Serial Number: 2007
Issue Time: 2025 Apr 03 1943 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Apr 03 1943 UTC
Valid To: 2025 Apr 04 0600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:56 UTC

Space Weather Message Code: WARK04
Serial Number: 4901
Issue Time: 2025 Apr 03 1756 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4900
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 04 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

17:55 UTC

Space Weather Message Code: WARK04
Serial Number: 4900
Issue Time: 2025 Apr 03 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4899
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 03 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

09:05 UTC

Space Weather Message Code: WARK04
Serial Number: 4899
Issue Time: 2025 Apr 03 0905 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4898
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 03 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

середа, 2 квітня 2025

21:12 UTC

Space Weather Message Code: WATA20
Serial Number: 1035
Issue Time: 2025 Apr 02 2112 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Apr 03: None (Below G1) Apr 04: G1 (Minor) Apr 05: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:59 UTC

Space Weather Message Code: WARK04
Serial Number: 4898
Issue Time: 2025 Apr 02 2059 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4897
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 03 1000 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

18:24 UTC

Space Weather Message Code: SUMPX1
Serial Number: 122
Issue Time: 2025 Apr 02 1824 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025 Mar 31 1105 UTC
Maximum Time: 2025 Apr 01 0425 UTC
End Time: 2025 Apr 02 0910 UTC
Maximum 10MeV Flux: 147 pfu
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

11:02 UTC

Space Weather Message Code: WARPX1
Serial Number: 600
Issue Time: 2025 Apr 02 1102 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 599
Valid From: 2025 Mar 31 1057 UTC
Now Valid Until: 2025 Apr 02 1800 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

08:51 UTC

Space Weather Message Code: WARK05
Serial Number: 2006
Issue Time: 2025 Apr 02 0851 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2005
Valid From: 2025 Apr 02 0233 UTC
Now Valid Until: 2025 Apr 02 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

08:51 UTC

Space Weather Message Code: WARK04
Serial Number: 4897
Issue Time: 2025 Apr 02 0851 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4896
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 02 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

02:34 UTC

Space Weather Message Code: WARK04
Serial Number: 4896
Issue Time: 2025 Apr 02 0234 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4895
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 02 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

02:34 UTC

Space Weather Message Code: WARK05
Serial Number: 2005
Issue Time: 2025 Apr 02 0234 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Apr 02 0233 UTC
Valid To: 2025 Apr 02 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

01:33 UTC

Space Weather Message Code: ALTK04
Serial Number: 2540
Issue Time: 2025 Apr 02 0133 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Apr 02 0132 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

01:23 UTC

Space Weather Message Code: WARK04
Serial Number: 4895
Issue Time: 2025 Apr 02 0123 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Apr 02 0123 UTC
Valid To: 2025 Apr 02 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

00:23 UTC

Space Weather Message Code: WATA20
Serial Number: 1034
Issue Time: 2025 Apr 02 0023 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Apr 02: None (Below G1) Apr 03: None (Below G1) Apr 04: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

вівторок, 1 квітня 2025

23:37 UTC

Space Weather Message Code: WARPX1
Serial Number: 599
Issue Time: 2025 Apr 01 2337 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 598
Valid From: 2025 Mar 31 1057 UTC
Now Valid Until: 2025 Apr 02 1200 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

18:15 UTC

Space Weather Message Code: SUMPX2
Serial Number: 56
Issue Time: 2025 Apr 01 1815 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2025 Apr 01 0205 UTC
Maximum Time: 2025 Apr 01 0425 UTC
End Time: 2025 Apr 01 0910 UTC
Maximum 10MeV Flux: 147 pfu
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

10:12 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3443
Issue Time: 2025 Apr 01 1012 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3442
Begin Time: 2025 Mar 28 1410 UTC
Yesterday Maximum 2MeV Flux: 2039 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

07:14 UTC

Space Weather Message Code: SUM10R
Serial Number: 863
Issue Time: 2025 Apr 01 0714 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2025 Apr 01 0645 UTC
Maximum Time: 2025 Apr 01 0645 UTC
End Time: 2025 Apr 01 0645 UTC
Duration: 1 minutes
Peak Flux: 190 sfu
Latest Penticton Noon Flux: 172 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

07:05 UTC

Space Weather Message Code: SUMXM5
Serial Number: 287
Issue Time: 2025 Apr 01 0704 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2025 Apr 01 0637 UTC
Maximum Time: 2025 Apr 01 0646 UTC
End Time: 2025 Apr 01 0653 UTC
X-ray Class: M5.6
Optical Class: na
Location: N10E25
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

06:51 UTC

Space Weather Message Code: ALTXMF
Serial Number: 478
Issue Time: 2025 Apr 01 0651 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Apr 01 0645 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

02:22 UTC

Space Weather Message Code: ALTPX2
Serial Number: 77
Issue Time: 2025 Apr 01 0222 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2025 Apr 01 0205 UTC
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures.
Spacecraft - Infrequent single-event upsets to satellites are possible.
Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies.

понеділок, 31 березня 2025

23:54 UTC

Space Weather Message Code: WARPX1
Serial Number: 598
Issue Time: 2025 Mar 31 2354 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 597
Valid From: 2025 Mar 31 1057 UTC
Now Valid Until: 2025 Apr 01 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

11:21 UTC

Space Weather Message Code: ALTPX1
Serial Number: 357
Issue Time: 2025 Mar 31 1121 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025 Mar 31 1105 UTC
NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

10:58 UTC

Space Weather Message Code: WARPX1
Serial Number: 597
Issue Time: 2025 Mar 31 1058 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025 Mar 31 1057 UTC
Valid To: 2025 Mar 31 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

05:02 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3442
Issue Time: 2025 Mar 31 0502 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3441
Begin Time: 2025 Mar 28 1410 UTC
Yesterday Maximum 2MeV Flux: 2772 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

неділя, 30 березня 2025

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3441
Issue Time: 2025 Mar 30 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3440
Begin Time: 2025 Mar 28 1410 UTC
Yesterday Maximum 2MeV Flux: 2968 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

субота, 29 березня 2025

05:07 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3440
Issue Time: 2025 Mar 29 0507 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3439
Begin Time: 2025 Mar 28 1410 UTC
Yesterday Maximum 2MeV Flux: 2819 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

пʼятниця, 28 березня 2025

23:57 UTC

Space Weather Message Code: WARK04
Serial Number: 4894
Issue Time: 2025 Mar 28 2357 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4893
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 29 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:09 UTC

Space Weather Message Code: SUMX01
Serial Number: 191
Issue Time: 2025 Mar 28 1609 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2025 Mar 28 1503 UTC
Maximum Time: 2025 Mar 28 1521 UTC
End Time: 2025 Mar 28 1542 UTC
X-ray Class: X1.1
Location: N06E75
NOAA Scale: R3 - Strong

Comment: This summary is resent to correct the X-ray Class of this event to an X1.1 vs an X1.4.

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

15:50 UTC

Space Weather Message Code: SUMX01
Serial Number: 190
Issue Time: 2025 Mar 28 1550 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2025 Mar 28 1503 UTC
Maximum Time: 2025 Mar 28 1521 UTC
End Time: 2025 Mar 28 1542 UTC
X-ray Class: X1.4
Location: N06E75
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

15:42 UTC

Space Weather Message Code: SUM10R
Serial Number: 862
Issue Time: 2025 Mar 28 1542 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2025 Feb 28 1506 UTC
Maximum Time: 2025 Feb 28 1514 UTC
End Time: 2025 Feb 28 1530 UTC
Duration: 24 minutes
Peak Flux: 380 sfu
Latest Penticton Noon Flux: 153 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

15:37 UTC

Space Weather Message Code: ALTTP4
Serial Number: 679
Issue Time: 2025 Mar 28 1537 UTC

ALERT: Type IV Radio Emission
Begin Time: 2025 Mar 28 1514 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

15:18 UTC

Space Weather Message Code: ALTXMF
Serial Number: 477
Issue Time: 2025 Mar 28 1518 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Mar 28 1507 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

14:28 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3439
Issue Time: 2025 Mar 28 1428 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025 Mar 28 1410 UTC
Station: GOES16




Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

08:23 UTC

Space Weather Message Code: WARK04
Serial Number: 4893
Issue Time: 2025 Mar 28 0823 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4892
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 28 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

четвер, 27 березня 2025

16:53 UTC

Space Weather Message Code: WARK04
Serial Number: 4892
Issue Time: 2025 Mar 27 1653 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4891
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 28 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:47 UTC

Space Weather Message Code: WARK05
Serial Number: 2004
Issue Time: 2025 Mar 27 1647 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2003
Valid From: 2025 Mar 26 0131 UTC
Now Valid Until: 2025 Mar 28 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:08 UTC

Space Weather Message Code: ALTK05
Serial Number: 1733
Issue Time: 2025 Mar 27 1608 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 27 1605 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

15:03 UTC

Space Weather Message Code: ALTK05
Serial Number: 1732
Issue Time: 2025 Mar 27 1503 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 27 1459 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

09:02 UTC

Space Weather Message Code: ALTK05
Serial Number: 1731
Issue Time: 2025 Mar 27 0902 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 27 0859 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:57 UTC

Space Weather Message Code: ALTK05
Serial Number: 1730
Issue Time: 2025 Mar 27 0557 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 27 0551 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

04:52 UTC

Space Weather Message Code: WARK05
Serial Number: 2003
Issue Time: 2025 Mar 27 0452 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2002
Valid From: 2025 Mar 26 0131 UTC
Now Valid Until: 2025 Mar 27 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

03:50 UTC

Space Weather Message Code: WARK04
Serial Number: 4891
Issue Time: 2025 Mar 27 0350 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4890
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 27 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

середа, 26 березня 2025

22:46 UTC

Space Weather Message Code: ALTK05
Serial Number: 1729
Issue Time: 2025 Mar 26 2246 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 26 2237 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:18 UTC

Space Weather Message Code: WARK06
Serial Number: 569
Issue Time: 2025 Mar 26 2018 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 568
Valid From: 2025 Mar 26 1338 UTC
Now Valid Until: 2025 Mar 27 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:16 UTC

Space Weather Message Code: ALTK06
Serial Number: 622
Issue Time: 2025 Mar 26 2016 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 26 2008 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:04 UTC

Space Weather Message Code: ALTK05
Serial Number: 1728
Issue Time: 2025 Mar 26 2004 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 26 2000 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:48 UTC

Space Weather Message Code: ALTK06
Serial Number: 621
Issue Time: 2025 Mar 26 1748 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 26 1700 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

17:01 UTC

Space Weather Message Code: WARK05
Serial Number: 2002
Issue Time: 2025 Mar 26 1701 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2001
Valid From: 2025 Mar 26 0131 UTC
Now Valid Until: 2025 Mar 27 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:59 UTC

Space Weather Message Code: WARK04
Serial Number: 4890
Issue Time: 2025 Mar 26 1659 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4889
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 27 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:58 UTC

Space Weather Message Code: ALTK05
Serial Number: 1727
Issue Time: 2025 Mar 26 1658 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 26 1628 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:04 UTC

Space Weather Message Code: ALTK06
Serial Number: 620
Issue Time: 2025 Mar 26 1404 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 26 1358 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

13:38 UTC

Space Weather Message Code: WARK06
Serial Number: 568
Issue Time: 2025 Mar 26 1338 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Mar 26 1338 UTC
Valid To: 2025 Mar 26 2100 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

11:17 UTC

Space Weather Message Code: WARK04
Serial Number: 4889
Issue Time: 2025 Mar 26 1117 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4888
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 26 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

11:17 UTC

Space Weather Message Code: WARK05
Serial Number: 2001
Issue Time: 2025 Mar 26 1117 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2000
Valid From: 2025 Mar 26 0131 UTC
Now Valid Until: 2025 Mar 26 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

11:12 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1409
Issue Time: 2025 Mar 26 1112 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Mar 26 0920 UTC
Estimated Velocity: 571 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

03:01 UTC

Space Weather Message Code: ALTK05
Serial Number: 1726
Issue Time: 2025 Mar 26 0301 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 26 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

01:32 UTC

Space Weather Message Code: WARK05
Serial Number: 2000
Issue Time: 2025 Mar 26 0132 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 26 0131 UTC
Valid To: 2025 Mar 26 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

вівторок, 25 березня 2025

21:12 UTC

Space Weather Message Code: WATA30
Serial Number: 248
Issue Time: 2025 Mar 25 2112 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Mar 26: G2 (Moderate) Mar 27: G1 (Minor) Mar 28: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:32 UTC

Space Weather Message Code: ALTK04
Serial Number: 2539
Issue Time: 2025 Mar 25 2032 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 25 2019 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

20:18 UTC

Space Weather Message Code: WARK04
Serial Number: 4888
Issue Time: 2025 Mar 25 2018 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 25 2017 UTC
Valid To: 2025 Mar 26 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

12:50 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1408
Issue Time: 2025 Mar 25 1250 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Mar 25 1236 UTC
Estimated Velocity: 516 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

03:20 UTC

Space Weather Message Code: WARK04
Serial Number: 4887
Issue Time: 2025 Mar 25 0320 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 25 0330 UTC
Valid To: 2025 Mar 25 1530 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

понеділок, 24 березня 2025

11:07 UTC

Space Weather Message Code: WATA30
Serial Number: 247
Issue Time: 2025 Mar 24 1107 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Mar 24: G1 (Minor) Mar 25: G2 (Moderate) Mar 26: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

04:11 UTC

Space Weather Message Code: WARK05
Serial Number: 1999
Issue Time: 2025 Mar 24 0411 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 24 0410 UTC
Valid To: 2025 Mar 24 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

02:35 UTC

Space Weather Message Code: ALTK04
Serial Number: 2538
Issue Time: 2025 Mar 24 0235 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 24 0233 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

01:29 UTC

Space Weather Message Code: WARK04
Serial Number: 4886
Issue Time: 2025 Mar 24 0129 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 24 0129 UTC
Valid To: 2025 Mar 24 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

00:57 UTC

Space Weather Message Code: SUMSUD
Serial Number: 285
Issue Time: 2025 Mar 24 0057 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2025 Mar 24 0038 UTC
Deviation: 15 nT
Station: NGK

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

00:28 UTC

Space Weather Message Code: WARSUD
Serial Number: 241
Issue Time: 2025 Mar 24 0028 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2025 Mar 24 0030 UTC
Valid To: 2025 Mar 24 0130 UTC
IP Shock Passage Observed: 2025 Mar 24 0017 UTC

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

субота, 22 березня 2025

23:37 UTC

Space Weather Message Code: ALTK05
Serial Number: 1725
Issue Time: 2025 Mar 22 2337 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 22 2337 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:05 UTC

Space Weather Message Code: WARK05
Serial Number: 1998
Issue Time: 2025 Mar 22 2305 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1997
Valid From: 2025 Mar 22 1648 UTC
Now Valid Until: 2025 Mar 23 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:05 UTC

Space Weather Message Code: WARK04
Serial Number: 4885
Issue Time: 2025 Mar 22 2305 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4884
Valid From: 2025 Mar 21 1715 UTC
Now Valid Until: 2025 Mar 23 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:49 UTC

Space Weather Message Code: WARK04
Serial Number: 4884
Issue Time: 2025 Mar 22 1649 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4883
Valid From: 2025 Mar 21 1715 UTC
Now Valid Until: 2025 Mar 22 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:48 UTC

Space Weather Message Code: WARK05
Serial Number: 1997
Issue Time: 2025 Mar 22 1648 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 22 1648 UTC
Valid To: 2025 Mar 22 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

11:21 UTC

Space Weather Message Code: WARK04
Serial Number: 4883
Issue Time: 2025 Mar 22 1121 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4882
Valid From: 2025 Mar 21 1715 UTC
Now Valid Until: 2025 Mar 22 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

06:03 UTC

Space Weather Message Code: WARK04
Serial Number: 4882
Issue Time: 2025 Mar 22 0603 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4881
Valid From: 2025 Mar 21 1715 UTC
Now Valid Until: 2025 Mar 22 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

03:37 UTC

Space Weather Message Code: ALTK05
Serial Number: 1724
Issue Time: 2025 Mar 22 0337 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 22 0335 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

03:13 UTC

Space Weather Message Code: WATA50
Serial Number: 85
Issue Time: 2025 Mar 22 0313 UTC

WATCH: Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
Mar 23: G3 (Strong) Mar 24: G1 (Minor) Mar 25: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

03:02 UTC

Space Weather Message Code: ALTK06
Serial Number: 619
Issue Time: 2025 Mar 22 0302 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 22 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

01:40 UTC

Space Weather Message Code: ALTK05
Serial Number: 1723
Issue Time: 2025 Mar 22 0139 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 22 0136 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

пʼятниця, 21 березня 2025

23:35 UTC

Space Weather Message Code: ALTK05
Serial Number: 1722
Issue Time: 2025 Mar 21 2335 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 21 2330 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

19:43 UTC

Space Weather Message Code: WARK06
Serial Number: 567
Issue Time: 2025 Mar 21 1943 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Mar 21 1945 UTC
Valid To: 2025 Mar 22 0600 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

18:55 UTC

Space Weather Message Code: ALTK05
Serial Number: 1721
Issue Time: 2025 Mar 21 1855 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 21 1855 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:33 UTC

Space Weather Message Code: WARK05
Serial Number: 1996
Issue Time: 2025 Mar 21 1733 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 21 1732 UTC
Valid To: 2025 Mar 22 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:31 UTC

Space Weather Message Code: ALTK04
Serial Number: 2537
Issue Time: 2025 Mar 21 1731 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 21 1730 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

17:12 UTC

Space Weather Message Code: WARK04
Serial Number: 4881
Issue Time: 2025 Mar 21 1712 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 21 1715 UTC
Valid To: 2025 Mar 22 0900 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:12 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1407
Issue Time: 2025 Mar 21 1612 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Mar 21 1557 UTC
Estimated Velocity: 242 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

середа, 19 березня 2025

21:03 UTC

Space Weather Message Code: ALTK05
Serial Number: 1720
Issue Time: 2025 Mar 19 2103 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 19 2059 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:52 UTC

Space Weather Message Code: WARK04
Serial Number: 4880
Issue Time: 2025 Mar 19 2052 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4879
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 20 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

20:39 UTC

Space Weather Message Code: WARK05
Serial Number: 1995
Issue Time: 2025 Mar 19 2039 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 19 2039 UTC
Valid To: 2025 Mar 20 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

07:50 UTC

Space Weather Message Code: WARK05
Serial Number: 1994
Issue Time: 2025 Mar 19 0750 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 19 0749 UTC
Valid To: 2025 Mar 19 1800 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:15 UTC

Space Weather Message Code: WARK04
Serial Number: 4879
Issue Time: 2025 Mar 19 0515 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4878
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 19 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

вівторок, 18 березня 2025

23:52 UTC

Space Weather Message Code: WARK04
Serial Number: 4878
Issue Time: 2025 Mar 18 2352 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4877
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 19 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

07:34 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3438
Issue Time: 2025 Mar 18 0734 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3437
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 6680 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

05:56 UTC

Space Weather Message Code: WARK04
Serial Number: 4877
Issue Time: 2025 Mar 18 0556 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4876
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 18 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

понеділок, 17 березня 2025

21:02 UTC

Space Weather Message Code: ALTK04
Serial Number: 2536
Issue Time: 2025 Mar 17 2102 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 17 2059 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

20:54 UTC

Space Weather Message Code: WARK04
Serial Number: 4876
Issue Time: 2025 Mar 17 2054 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4875
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 18 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:48 UTC

Space Weather Message Code: WARK04
Serial Number: 4875
Issue Time: 2025 Mar 17 1448 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4874
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 17 2100 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:21 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3437
Issue Time: 2025 Mar 17 0521 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3436
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 5055 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

03:48 UTC

Space Weather Message Code: WARK04
Serial Number: 4874
Issue Time: 2025 Mar 17 0348 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 17 0345 UTC
Valid To: 2025 Mar 17 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

неділя, 16 березня 2025

14:48 UTC

Space Weather Message Code: WARK04
Serial Number: 4873
Issue Time: 2025 Mar 16 1448 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 16 1447 UTC
Valid To: 2025 Mar 17 0300 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

07:37 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3436
Issue Time: 2025 Mar 16 0737 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3435
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 4951 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

субота, 15 березня 2025

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3435
Issue Time: 2025 Mar 15 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3434
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 3982 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

01:55 UTC

Space Weather Message Code: WARK04
Serial Number: 4872
Issue Time: 2025 Mar 15 0155 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4871
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 15 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

01:42 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3434
Issue Time: 2025 Mar 15 0142 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3433
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 3982 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

пʼятниця, 14 березня 2025

17:34 UTC

Space Weather Message Code: WARK04
Serial Number: 4871
Issue Time: 2025 Mar 14 1734 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4870
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 15 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

10:45 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3433
Issue Time: 2025 Mar 14 1045 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3432
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 1561 pfu



Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.