Sunspot region AR8557

Number of
sunspots
Size Class Magn. Class Spot Location
1999/05/28 5 90 DSO S28E73
1999/05/29 4 30 DRO S29E56
1999/05/30 7 130 CAO S30E46
1999/05/31 5 70 DAO S30E34
1999/06/01 5 30 HAX S30E21
1999/06/02 9 20 CRO S29E08
1999/06/03 4 10 BXO S27W06
C
3

The top 3 solar flares from sunspot region 8557

Start Maximum End
1C8.911999/05/2715:1515:3516:03
2C3.141999/05/2811:3012:1312:42
3C1.861999/06/0112:3112:3412:37

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Last X-flare2025/03/28X1.1
Last M-flare2025/04/22M1.3
Last geomagnetic storm2025/04/21Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
March 2025134.2 -20.4
April 2025124.6 -9.6
Last 30 days122.9 -6.2

This day in history*

Solar flares
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*since 1994

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