Sunspot region AR8551

Number of
sunspots
Size Class Magn. Class Spot Location
1999/05/22 2 60 CSO N32E62
1999/05/23 3 50 CSO N33E50
1999/05/24 6 40 CSO N32E36
1999/05/25 9 70 CSO N32E25
1999/05/26 5 60 CSO N32E10
1999/05/27 5 50 CSO N31W02
1999/05/28 6 50 CSO N32W14
1999/05/29 1 20 HSX N32W25
1999/05/30 1 20 HSX N31W37
1999/05/31 3 10 AXX N30W49
1999/06/02 1 0 AXX N32W77
1999/06/03 1 0 AXX N32W90
C
8

The top 8 solar flares from sunspot region 8551

Start Maximum End
1C4.931999/05/2314:2514:4014:54
2C3.541999/06/0207:0507:1007:13
3C2.691999/05/2310:3510:4310:52
4C2.341999/05/2408:0608:1308:38
5C1.711999/06/0210:5410:5711:00
6C1.661999/05/3006:0506:1206:23
7C1.561999/05/2406:4406:4806:51
8C1.51999/05/2413:2513:2813:31

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Last X-flare2026/04/24X2.5
Last M-flare2026/05/17M1.4
Last geomagnetic storm2026/05/16Kp6- (G2)
Spotless days
Last 365 days3 days
20263 days (2%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
April 202679.3 -6.6
May 202691.4 +12.1
Last 30 days98.4 +8

This day in history*

Solar flares
12022M5.6
22023M5.3
32025M3.19
42023M2.7
52024M2.5
DstG
11984-59G1
22002-58
31981-55
41990-55
52024-53
*since 1994

Aurora on this day in history

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