Sunspot region AR8540

Number of
sunspots
Size Class Magn. Class Spot Location
1999/05/08 3 60 CSO S28E70
1999/05/09 5 140 EAO S28E59
1999/05/10 9 80 DSO S28E46
1999/05/11 10 100 DSO S27E33
1999/05/12 13 50 BXO S26E19
1999/05/13 12 40 CRO S27E08
1999/05/14 6 20 BXO S27W05
1999/05/15 5 10 BXO S25W22
1999/05/16 2 0 BXO S25W33
1999/05/17 1 0 AXX S31W38
1999/05/20 1 0 AXX S29W76
C
2

The top 2 solar flares from sunspot region 8540

Start Maximum End
1C2.371999/05/1421:5822:3122:46
2C1.871999/05/1020:1920:2220:31

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Last X-flare2024/11/06X2.39
Last M-flare2024/11/20M1.1
Last geomagnetic storm2024/11/10Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2024166.4 +25
November 2024142.7 -23.8
Last 30 days156.1 +4.7

This day in history*

Solar flares
11998X5.37
21998X3.59
32001X1.41
42001M5.51
51998M2.7
DstG
11991-139G2
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*since 1994

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