Viewing archive of Sunday, 28 July 2013 - Sunspot regions

Sunspot regions

Courtesy of SDO, SOHO (NASA) and the [AIA, EVE, and/or HMI] consortium.
Sunspot number New regionsBackground fluxMaximum fluxC
68 40 -1B5.43C4.629

Sunspot regions

Region 11800

Number of
sunspots
Size Class Magn. Class Spot Location
17 5 210 50 DAO S08W60
HMIIF
HMIBC

Solar flares on this day

C2.44 C3.24 C4.58 C2.18 C2.24

Region 11801

Number of
sunspots
Size Class Magn. Class Spot Location
1 90 10 HSX N20E16
HMIIF
HMIBC

Region 11805

Number of
sunspots
Size Class Magn. Class Spot Location
4 1 30 10 CSO S06W30
HMIIF
HMIBC

Solar flares on this day

B9.53 C2.04

Region 11806

Number of
sunspots
Size Class Magn. Class Spot Location
2 10 AXX S16E57
HMIIF
HMIBC

All times in UTC

<< Go to daily overview page

G2 - Moderate geomagnetic storm

Observed Kp: 6
Threshold reached: 20:16 UTC

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Rovaniemi, Sodankylä, Utsjoki
Reykjavik
Kirkenes, Tromsø
Murmansk
Kiruna, Luleå
The solar wind speed is currently moderately high (561.9 km/sec.)
The strength of the interplanetary magnetic field is moderate (17.91nT), the direction is North (4.74nT).
The Disturbance Storm Time index predicts moderate storm conditions right now (-66nT)

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Latest alerts

20:30 UTC - Geomagnetic activity

Moderate G2 geomagnetic storm (Kp6) Threshold Reached: 20:08 UTC

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20:15 UTC - Geomagnetic activity

Minor G1 geomagnetic storm (Kp5) Threshold Reached: 20:00 UTC

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18:00 UTC - Geomagnetic activity

Moderate G2 geomagnetic storm (Kp6) Threshold Reached: 17:00 UTC

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17:00 UTC - Geomagnetic activity

Minor G1 geomagnetic storm (Kp5) Threshold Reached: 16:28 UTC

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14:15 UTC - Geomagnetic activity

Moderate G2 geomagnetic storm (Kp6) Threshold Reached: 13:58 UTC

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Space weather facts

Last X-flare2025/02/23X2.0
Last M-flare2025/03/26M1.0
Last geomagnetic storm2025/03/22Kp6- (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
March 2025135 -19.6
Last 30 days133.7 -19.9

This day in history*

Solar flares
12001M3.86
22000M3.34
32001M3.14
41998M2.37
52024M1.9
DstG
11976-226G4
21991-168G4
31988-154G3
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*since 1994

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