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Sunspot region AR12617

Number of
sunspots		 Size Class Magn. Class Spot Location
2016/12/12 3 10 BXO N17W44
2016/12/13 3 10 BXO N16W59
2016/12/14 4 70 CAO N16W72
2016/12/15 4 70 CSO N16W86
2016/12/16 4 70 CSO N16W0*
B
5

The top 5 solar flares from sunspot region 12617

Start Maximum End
1B2.982016/12/1503:2403:3003:34
2B2.432016/12/1609:3809:4309:53
3B1.242016/12/1117:1017:1517:18
4B1.192016/12/1119:1619:2519:29
5B12016/12/1604:2604:2904:36
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SWPC Display bug or other issues 33AR4425 57CMEs from AR4420 (April 23th - 24th) 55Incoming & Unnumbered Active Regions 294AR4420 211
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Space weather facts

Last X-flare2026/04/24X2.5
Last M-flare2026/04/28M1.1
Last geomagnetic storm2026/04/20Kp5 (G1)
Spotless days
Last 365 days3 days
20263 days (3%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
March 202685.9 +7.7
April 202688.4 +2.5
Last 30 days91.7 +5.2

This day in history*

Solar flares
11998M9.27
22024M3.71
32024M2.53
42025M1.7
51999M1.7
DstG
11960-99G2
21990-98G1
31991-97G3
41983-86G2
51979-75G2
*since 1994

Aurora on this day in history

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