Sunspot region AR11921

Number of
sunspots
Size Class Magn. Class Spot Location
2013/12/10 2 120 HSX N06E75
2013/12/11 2 350 HKX N06E62
2013/12/12 2 350 HKX N07E50
2013/12/13 2 360 HKX N08E37
2013/12/14 8 350 CKO N07E23
2013/12/15 9 380 CKO N07E10
2013/12/16 9 400 HKX N07W03
2013/12/17 7 300 CKO N06W15
2013/12/18 7 300 CKO N06W15
2013/12/19 2 220 DSO N06W43
2013/12/20 2 220 HAX N06W57
2013/12/22 2 180 HAX N07W85
2013/12/23 1 60 HSX N07W94
2013/12/24 1 60 HSX N07W0*
C
4

The top 4 solar flares from sunspot region 11921

Start Maximum End
1C8.542013/12/1222:0522:1422:19
2C3.772013/12/0916:5116:5617:02
3C2.282013/12/1910:1410:2610:31
4C2.052013/12/1908:1708:2808:49

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Space weather facts

Last X-flare2026/03/30X1.5
Last M-flare2026/04/04M1.3
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 2026133.3 +47.4
Last 30 days96.1 +32

This day in history*

Solar flares
12002M8.82
22026M7.6
31999M6.76
42001M2.91
52003M2.74
DstG
11979-202G3
21988-133G3
31984-120G4
42004-117G2
51994-111G3
*since 1994

Aurora on this day in history

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