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Sunspot region AR11820

Number of
sunspots		 Size Class Magn. Class Spot Location
2013/08/14 4 60 CSO S13E59
2013/08/15 6 20 CRO S12E45
2013/08/16 7 30 CRO S13E31
2013/08/17 7 20 CRO S13E25
2013/08/18 5 10 BXO S13E10
2013/08/19 5 10 BXO S13W03
2013/08/20 5 10 BXO S12W19
2013/08/21 10 60 DAI S12W34
2013/08/22 15 130 DAI S12W47
2013/08/23 8 110 DAO S12W61
2013/08/24 3 70 CAO S12W73
2013/08/25 1 40 HSX S13W83
2013/08/26 1 40 HSX S13W97
C
3

The top 3 solar flares from sunspot region 11820

Start Maximum End
1C5.922013/08/2204:4905:0605:15
2C2.012013/08/2315:4015:5716:06
3C1.212013/08/2315:3015:3315:35
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Space weather facts

Last X-flare2025/12/08X1.1
Last M-flare2025/12/21M1.3
Last geomagnetic storm2025/12/22Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 202591.8 -22.8
December 2025114.3 +22.5
Last 30 days110.4 +23.9

This day in history*

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*since 1994

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