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Sunspot region AR13990

Number of
sunspots		 Size Class Magn. Class Spot Location
2025/02/10 3 220 CAO S09E68
2025/02/11 3 260 DKO S09E54
2025/02/12 7 260 DKO S09E40
2025/02/13 7 310 CKI S09E26
2025/02/14 8 310 DKI S09E12
2025/02/15 18 310 CKI S10W01
2025/02/16 42 280 CKI S09W14
2025/02/17 17 250 CKO S08W28
2025/02/18 12 250 CKO S09W37
2025/02/19 6 250 CKO S09W51
2025/02/20 6 250 CKO S09W64
2025/02/21 3 120 CSO S09W78
2025/02/22 2 120 CSO S09W92
2025/02/23 2 120 CSO S09W0*
CM
162

The top 10 solar flares from sunspot region 13990

Start Maximum End
1M1.82025/02/1420:4520:5721:05
2M1.22025/02/1409:4810:0610:19
3C9.02025/02/1322:1622:4323:10
4C5.82025/02/2111:1211:1911:25
5C5.62025/02/1800:4601:0801:26
6C3.62025/02/2118:5018:5919:05
7C3.42025/02/1910:0410:1610:32
8C3.32025/02/2207:0007:0507:09
9C3.22025/02/1122:1722:4623:30
10C3.22025/02/2201:4201:4801:53
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Last X-flare2026/04/24X2.5
Last M-flare2026/05/17M1.4
Last geomagnetic storm2026/05/16Kp6- (G2)
Spotless days
Last 365 days3 days
20263 days (2%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
April 202679.3 -6.6
May 202689.2 +9.9
Last 30 days100.3 +9.4

This day in history*

Solar flares
12013M7.24
22024M2.32
32023M1.9
42024M1.5
52021M1.4
DstG
11992-102G2
21990-90G1
31979-74G1
42003-73G1
51978-68G1
*since 1994

Aurora on this day in history

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