Region 8728

Number of
sunspots
Size Class Magn. Class Spot Location
1999/10/09 1 30 HSX N22E74
1999/10/10 10 150 CAO N21E62
1999/10/11 13 340 DHO N22E50
1999/10/12 22 560 EKI N22E38
1999/10/13 19 560 EKI N22E25
1999/10/14 26 520 FKO N23E15
1999/10/15 21 330 EKO N22E00
1999/10/16 20 310 EAO N22W13
1999/10/17 29 290 EAO N23W26
1999/10/18 10 220 EAO N23W40
1999/10/19 2 170 CSO N22W59
1999/10/20 3 130 DAO N24W70
1999/10/21 3 110 CAO N24W83
1999/10/22 1 80 HAX N22W94
C
2

The top 2 solar flares from sunspot region 8728

Start Maximum End
1C2.31999/10/1605:0505:1705:20
2C1.51999/10/1818:5218:5719:03

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Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/10/26Kp5 (G1)
Number of spotless days in 2020:16
Last spotless day:2020/01/23

This day in history*

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*since 1994

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