Sunspot region AR12645

Number of
sunspots
Size Class Magn. Class Spot Location
2017/03/27 3 10 BXI S10E73
2017/03/28 3 30 CSO S09E59
2017/03/29 8 70 DAI S09E44
2017/03/30 12 180 DSI S10E29
2017/03/31 10 260 DKI S11E15
2017/04/01 29 380 EKC S09E02
2017/04/02 25 520 EKC S09W11
2017/04/03 23 600 EHC S09W25
2017/04/04 35 700 EKC S08W38
2017/04/05 16 680 EKC S10W53
2017/04/06 12 500 FKC S10W67
2017/04/07 14 380 EKC S10W79
2017/04/08 5 70 CAO S09W91
2017/04/09 5 70 CAO S09W0*
ABCM
127361

The top 10 solar flares from sunspot region 12645

Start Maximum End
1M1.142017/04/0202:4102:4602:48
2C7.952017/04/0612:0112:1012:20
3C7.362017/03/2717:5518:2018:24
4C7.262017/04/0122:5923:0323:05
5C7.022017/04/0423:3023:4223:46
6C6.132017/04/0719:4219:4919:52
7C5.582017/04/0311:0711:1311:25
8C5.42017/04/0308:0908:1408:21
9C4.932017/04/0313:0113:0613:09
10C4.632017/03/2711:0711:1211:18

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Space weather facts

Last X-flare2026/03/30X1.5
Last M-flare2026/04/03M1.3
Last geomagnetic storm2026/04/02Kp6- (G2)
Spotless days
Last 365 days3 days
20263 days (3%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
March 202685.9 +7.7
April 2026141 +55.1
Last 30 days95.4 +31.2

This day in history*

Solar flares
12001X1.77
22017M8.35
31999M6.2
42001M3.57
52017M1.81
DstG
11979-168G4
21960-151G3
31992-105G2
42004-104G2
51994-103G3
*since 1994

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