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Sunspot region AR13977

Number of
sunspots		 Size Class Magn. Class Spot Location
2025/01/27 2 40 CAO N18E79
2025/01/28 11 50 CAO N18E65
2025/01/29 16 100 DAC N19E53
2025/01/30 16 110 CAO N19E42
2025/01/31 16 110 CAO N19E28
2025/02/01 16 110 CAO N19E14
2025/02/02 12 120 CAO N19W00
2025/02/03 12 120 DAI N19W14
2025/02/04 22 150 EAI N19W28
2025/02/05 9 120 DAI N18W41
2025/02/06 7 60 CAO N18W55
2025/02/07 1 10 AXX N18W68
2025/02/08 1 10 AXX N18W82
2025/02/09 1 10 AXX N18W96
2025/02/10 1 10 AXX N18W0*
CM
249

The top 10 solar flares from sunspot region 13977

Start Maximum End
1M5.12025/02/0213:5814:0414:08
2M3.22025/02/0412:5413:1313:22
3M2.72025/02/0507:4407:5007:57
4M2.52025/02/0113:1313:1913:23
5M1.82025/01/3120:1420:2320:28
6M1.712025/01/2819:4119:4519:49
7M1.212025/02/0215:0415:1315:17
8M1.22025/02/0405:0705:1805:26
9M12025/01/2903:3604:0804:21
10C7.92025/02/0501:0101:0901:14
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Space weather facts

Last X-flare2026/04/24X2.5
Last M-flare2026/04/28M1.11
Last geomagnetic storm2026/04/20Kp5 (G1)
Spotless days
Last 365 days3 days
20263 days (2%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
April 202679.3 -6.6
May 2026145.5 +66.2
Last 30 days91 -4.3

This day in history*

Solar flares
12024X1.6
22022X1.1
32013M8.19
42023M7.2
51999M6.41
DstG
11967-123G3
21978-114G3
31976-107G4
41994-79G2
51977-77G1
*since 1994

Aurora on this day in history

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