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Sunspot region AR12900

Number of
sunspots		 Size Class Magn. Class Spot Location
2021/11/26 7 50 CRO S28W12
2021/11/27 9 130 DSO S28W26
2021/11/28 15 160 DSO S28W36
2021/11/29 11 240 DAO S26W50
2021/11/30 3 240 DAO S26W65
2021/12/01 2 210 DAO S26W78
2021/12/02 1 0 AXX S27W89
2021/12/03 1 0 AXX S27W0*
B
21

The top 10 solar flares from sunspot region 12900

Start Maximum End
1B8.62021/11/2808:4908:5909:14
2B7.02021/11/2809:1809:2409:32
3B5.52021/11/2900:0100:1200:31
4B5.42021/11/2818:1918:2618:40
5B5.12021/11/2704:1804:5005:11
6B4.92021/11/2610:4510:5010:54
7B4.82021/11/2808:1108:2108:25
8B4.32021/11/2808:0008:0408:14
9B4.22021/11/2807:4707:5508:00
10B3.82021/11/2723:1623:3023:54
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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*

Solar flares
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32023X1.2
42024M3.2
52001M3.13
DstG
11959-154G3
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*since 1994

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