Viewing archive of Wednesday, 17 April 2013 - Sunspot regions

Sunspot regions

Courtesy of SDO, SOHO (NASA) and the [AIA, EVE, and/or HMI] consortium.
Sunspot number New regionsBackground fluxMaximum fluxC
89 -80B4C1.975

Sunspot regions

Region 11719

Number of
sunspots
Size Class Magn. Class Spot Location
3 50 -10 CSO N10W79
HMIIF
HMIBC

Solar flares on this day

C1.94 C1.07 C1.83 C1.79

Region 11721

Number of
sunspots
Size Class Magn. Class Spot Location
5 -1 120 10 CSO S17W61
HMIIF
HMIBC

Region 11722

Number of
sunspots
Size Class Magn. Class Spot Location
6 -2 90 50 DAO S19W48
HMIIF
HMIBC

Region 11723

Number of
sunspots
Size Class Magn. Class Spot Location
21 -2 200 20 DAI S18W05
HMIIF
HMIBC

Region 11724

Number of
sunspots
Size Class Magn. Class Spot Location
4 -3 40 -30 CSO S26E19
HMIIF
HMIBC

All times in UTC

<< Go to daily overview page

G2 - Moderate geomagnetic storm

Observed Kp: 6
Threshold reached: 17:48 UTC

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

Oulu, Rovaniemi, Sodankylä, Utsjoki
Kirkenes
Murmansk, Norilsk, Vorkuta
Luleå
The solar wind speed is currently moderately high (596.7 km/sec.)
The strength of the interplanetary magnetic field is moderate (14.03nT), the direction is North (2.72nT).
The Disturbance Storm Time index predicts moderate storm conditions right now (-76nT)

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Latest alerts

18:00 UTC - Geomagnetic activity

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

alert


17:00 UTC - Geomagnetic activity

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

alert


14:15 UTC - Geomagnetic activity

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

alert


12:18 UTC - Hemispheric Power Index

The OVATION model predicts the Hemispheric Power Index to reach 75GW at 13:21 UTC


11:54 UTC - Hemispheric Power Index

The OVATION model predicts the Hemispheric Power Index to reach 51GW at 12:57 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
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52024M1.9
DstG
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*since 1994

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