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Sunspot region AR12636

Number of
sunspots		 Size Class Magn. Class Spot Location
2017/02/16 2 10 AXX N11E53
2017/02/17 2 10 HRX N11E40
2017/02/18 4 20 CRO N11E27
2017/02/19 3 20 BXO N11E15
2017/02/20 1 10 AXX N11E01
AB
13

The top 4 solar flares from sunspot region 12636

Start Maximum End
1B2.712017/02/1512:3412:4312:46
2B1.762017/02/1709:2709:3209:38
3B1.292017/02/1709:5309:5609:58
4A9.312017/02/1520:4820:5120:54
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AR4418 4Photographing auroras 241Incoming & Unnumbered Active Regions 271AR4416 15Unspecified geomagnetic activity 152
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Last X-flare2026/03/30X1.5
Last M-flare2026/04/09M1.0
Last geomagnetic storm2026/04/03Kp7- (G3)
Spotless days
Last 365 days3 days
20263 days (3%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
March 202685.9 +7.7
April 202697.2 +11.3
Last 30 days95.6 +37.2

This day in history*

Solar flares
12025M3.24
22024M2.41
32025M2.31
42025M1.6
52025M1.41
DstG
11981-311G4
21990-108G1
31973-84G3
42001-77G3
51969-64
*since 1994

Aurora on this day in history

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