Sunspot region AR12817

Number of
sunspots
Size Class Magn. Class Spot Location
2021/04/19 8 60 BXO N18W45
2021/04/20 13 140 DAI N18W60
2021/04/21 7 180 DAO N18W76
2021/04/22 5 140 CSO N18W92
2021/04/23 5 140 CSO N18W0*
BC
4812

The top 10 solar flares from sunspot region 12817

Start Maximum End
1C8.62021/04/2220:0020:1120:20
2C4.32021/04/2209:1409:2109:41
3C3.72021/04/2210:4010:4911:03
4C2.42021/04/2323:0823:1223:16
5C2.32021/04/2207:1607:2307:27
6C2.32021/04/2322:3922:5422:57
7C2.32021/04/2322:5723:0123:06
8C1.72021/04/2205:5005:5706:02
9C1.62021/04/2101:1801:2902:37
10C1.42021/04/2210:0310:0810:14

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Space weather facts

Last X-flare2025/01/04X1.85
Last M-flare2025/02/17M1.1
Last geomagnetic storm2025/02/19Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
January 2025137 -17.5
February 2025152.1 +15.1
Last 30 days149.7 -13.9

This day in history*

Solar flares
12024X1.9
22002M5.62
32023M5.0
42023M4.7
52000M2.6
DstG
11992-171G3
21994-135G4
31973-121G3
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51990-67
*since 1994

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