Sunspot region AR8640

Number of
sunspots
Size Class Magn. Class Spot Location
1999/07/21 1 40 HSX N17E76
1999/07/22 1 80 HSX N17E63
1999/07/23 1 90 HSX N17E49
1999/07/24 1 110 HSX N17E37
1999/07/25 1 120 HAX N17E24
1999/07/26 1 90 HSX N17E10
1999/07/27 1 90 HSX N17W03
1999/07/28 1 90 HSX N17W16
1999/07/29 2 70 HSX N17W28
1999/07/30 7 110 CSO N16W42
1999/07/31 4 100 CSO N16W55
1999/08/01 3 90 CSO N17W69
1999/08/02 1 60 HSX N18W82
1999/08/03 1 10 HSX N17W94

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Space weather facts

Last X-flare2024/12/08X2.2
Last M-flare2024/12/23M8.9
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024106.6 -45.9
Last 30 days114.4 -44.3

This day in history*

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DstG
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*since 1994

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