Region 8731

Number of
sunspots
Size Class Magn. Class Spot Location
1999/10/12 6 120 EAO N10E62
1999/10/13 14 340 EKO N11E51
1999/10/14 38 620 EKO N11E37
1999/10/15 45 790 EKC N19E24
1999/10/16 27 850 FKC N12E10
1999/10/17 62 1000 FKC N12W03
1999/10/18 54 1220 FKC N13W19
1999/10/19 35 980 FKC N19W27
1999/10/20 63 640 FKC N13W44
1999/10/21 45 440 EKI N14W55
1999/10/22 28 320 EAI N12W67
1999/10/23 12 160 ESI N12W79
CX
101

The top 10 solar flares from sunspot region 8731

Start Maximum End
1X1.81999/10/1408:5409:0009:03
2C7.41999/10/1500:5801:1501:31
3C5.71999/10/1402:2802:3802:50
4C4.21999/10/1403:1903:2403:30
5C3.71999/10/1512:1812:2712:39
6C3.01999/10/1521:3221:3821:41
7C2.71999/10/1422:2722:3122:34
8C2.71999/10/1817:3317:3917:45
9C2.51999/10/1522:2622:3122:35
10C1.81999/10/1207:4508:5409:52

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/08/05Kp5 (G1)
Number of spotless days in 2019:158
Current stretch spotless days:13

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*since 1994

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