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Sunspot region AR12877

Number of
sunspots		 Size Class Magn. Class Spot Location
2021/09/26 4 10 BXO S13E06
2021/09/27 4 20 CRO S17W12
2021/09/28 10 30 CRO S18W27
2021/09/29 14 130 DAI S18W41
2021/09/30 13 200 DAO S18W52
2021/10/01 4 200 DAO S18W66
2021/10/02 2 150 DAO S20W78
2021/10/03 1 30 HSX S21W93
2021/10/04 1 30 HSX S21W0*
BC
287

The top 10 solar flares from sunspot region 12877

Start Maximum End
1C2.82021/09/2921:4621:5622:02
2C1.92021/10/0307:0707:2207:46
3C1.72021/09/2922:3422:4522:50
4C1.72021/10/0222:2322:4022:57
5C1.42021/09/2922:1022:1322:17
6C1.22021/09/3012:4312:4912:55
7C1.02021/09/2914:1514:2114:25
8B9.52021/09/3005:4205:4905:55
9B9.42021/10/0402:5203:0703:18
10B8.62021/09/2911:1111:1911:25
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Last X-flare2025/03/28X1.1
Last M-flare2025/03/28M1.7
Last geomagnetic storm2025/03/27Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
March 2025130 -24.6
Last 30 days130 -21.9

This day in history*

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DstG
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*since 1994

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