Sunspot region AR8517

Number of
sunspots
Size Class Magn. Class Spot Location
1999/04/17 4 20 BXO N20W21
1999/04/18 3 30 CSO N22W36
1999/04/19 6 30 CRO N22W51
1999/04/20 5 70 DSO N22W63
1999/04/21 3 100 DSO N22W77
1999/04/22 1 40 HSX N24W88
BC
31

The top 4 solar flares from sunspot region 8517

Start Maximum End
1C1.11999/04/1821:1221:1921:23
2B8.361999/04/2100:1900:2200:27
3B6.761999/04/2116:4616:5016:52
4B5.231999/04/2106:0206:0506:07

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Space weather facts

Last X-flare2024/11/06X2.39
Last M-flare2024/11/13M1.7
Last geomagnetic storm2024/11/10Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2024166.4 +25
November 2024166 -0.4
Last 30 days163.2 +18.4

This day in history*

Solar flares
11999X1.15
21999M8.06
32005M5.58
41999M4.11
52005M3.72
DstG
11960-167G3
21998-109G2
32012-108G2
41989-105
51979-90G1
*since 1994

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