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Sunspot region AR11877

Number of
sunspots		 Size Class Magn. Class Spot Location
2013/10/19 1 120 HSX S11E75
2013/10/20 4 260 CKO S12E61
2013/10/21 8 390 FHO S13E55
2013/10/22 10 400 CHO S13E38
2013/10/23 15 390 DKI S13E23
2013/10/24 17 320 DKI S12E09
2013/10/25 19 440 DKC S12W03
2013/10/26 16 390 DHI S12W16
2013/10/27 15 320 CHI S12W30
2013/10/28 15 320 CHI S12W30
2013/10/29 13 230 DAI S12W56
2013/10/30 9 310 DKO S12W71
2013/10/31 2 160 DAO S13W81
CMX
1241

The top 10 solar flares from sunspot region 11877

Start Maximum End
1X1.342013/10/2400:2100:3000:35
2M2.812013/10/3113:3613:5114:02
3M2.022013/10/2811:3211:5312:39
4M1.262013/10/2617:0417:1517:26
5M1.112013/10/2618:5019:2019:23
6C8.212013/10/2422:0522:1022:15
7C7.412013/10/2608:3708:4608:49
8C6.382013/10/2608:5208:5508:57
9C5.712013/10/2713:3913:4714:06
10C4.012013/10/2613:1913:2113:24
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Space weather facts

Last X-flare2026/03/30X1.5
Last M-flare2026/04/02M3.5
Last geomagnetic storm2026/04/02Kp6- (G2)
Spotless days
Last 365 days3 days
20263 days (3%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
February 202678.2 -34.3
April 2026141 +62.8
Last 30 days94.6 +27

This day in history*

Solar flares
12001X1.77
22017M8.35
31999M6.2
42001M3.57
52017M1.81
DstG
11979-168G4
21960-151G3
31992-105G2
42004-104G2
51994-103G3
*since 1994

Aurora on this day in history

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