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Sunspot region AR11931

Number of
sunspots		 Size Class Magn. Class Spot Location
2013/12/19 1 100 HAX S14E76
2013/12/20 1 210 HAX S15E62
2013/12/22 2 220 HSX S15E36
2013/12/23 1 170 HSX S15E21
2013/12/24 1 190 HAX S14E08
2013/12/25 1 210 HAX S15W04
2013/12/26 5 230 HAX S16W16
2013/12/27 3 170 CAO S15W29
2013/12/28 3 160 CAO S15W43
2013/12/29 1 140 HSX S15W58
2013/12/30 1 110 HSX S14W73
2013/12/31 1 130 HAX S14W87
2014/01/01 1 130 HAX S14W0*
C
2

The top 2 solar flares from sunspot region 11931

Start Maximum End
1C3.152013/12/2606:5507:0207:07
2C1.892013/12/1919:0819:1219:15
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Last X-flare2026/02/04X4.21
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Last geomagnetic storm2026/02/16Kp6 (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
January 2026112.6 -11.4
February 2026103.9 -8.7
Last 30 days121.7 +18

This day in history*

Solar flares
12011M9.61
22011M2.15
32011M1.97
42002M1.55
52011M1.54
DstG
11999-123G3
21961-101G3
31998-100G3
42005-80G2
52015-69G1
*since 1994

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