Sunspot region AR12171

Number of
sunspots
Size Class Magn. Class Spot Location
2014/09/20 2 80 DSO S09E65
2014/09/21 7 160 DAO S10E53
2014/09/22 8 160 EAI S10E39
2014/09/23 11 150 EAO S10E25
2014/09/24 7 150 EAC S10E11
2014/09/25 6 80 ESO S11W01
2014/09/26 11 100 EAO S12W15
2014/09/27 10 130 EAO S11W28
2014/09/28 10 130 EAO S11W28
2014/09/29 12 100 CAO S11W54
2014/09/30 5 30 CSO S10W66
2014/10/01 1 40 HSX S06W83
2014/10/02 1 40 HSX S06W98
C
3

The top 3 solar flares from sunspot region 12171

Start Maximum End
1C4.792014/09/1917:2718:3218:58
2C4.552014/09/2519:1220:3221:47
3C1.522014/09/2012:4312:5413:06

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Space weather facts

Last X-flare2026/03/30X1.5
Last M-flare2026/04/09M1.0
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 2026114.3 +28.4
Last 30 days102.4 +48.5

This day in history*

Solar flares
12001X3.14
22002X1.17
32023M2.83
42002M2.34
52000M1.23
DstG
11990-281G4
21982-137G3
31957-124G3
41959-122G4
51960-81G3
*since 1994

Aurora on this day in history

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