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Sunspot region AR11900

Number of
sunspots		 Size Class Magn. Class Spot Location
2013/11/15 10 30 DSO S19W17
2013/11/16 24 150 DAC S19W29
2013/11/17 20 110 DAC S19W42
2013/11/18 31 130 DAC S19W55
2013/11/19 10 70 DAI S21W67
2013/11/20 7 100 DAI S21W79
2013/11/21 4 60 CSO S23W88
2013/11/22 4 60 CSO S23W0*
CM
163

The top 10 solar flares from sunspot region 11900

Start Maximum End
1M2.412013/11/1607:4507:4907:53
2M1.832013/11/1604:4704:5304:57
3M1.492013/11/1705:0605:1005:13
4C7.452013/11/1623:2423:3123:34
5C5.082013/11/1701:0201:0701:13
6C4.632013/11/1702:1202:1702:21
7C4.392013/11/1520:0220:0920:15
8C3.822013/11/1613:4113:4913:57
9C3.732013/11/1622:4322:4822:52
10C3.632013/11/1614:1514:1914:28
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Last X-flare2026/02/04X4.3
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Last geomagnetic storm2026/01/28Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
December 2025124 +32.2
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Last 30 days123.1 +14.7

This day in history*

Solar flares
12000X1.74
22026M2.7
32025M2.7
42026M2.5
52024M2.1
DstG
11983-183G4
21961-140G2
31982-111G2
41957-87G2
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*since 1994

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