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Sunspot region AR12403

Number of
sunspots		 Size Class Magn. Class Spot Location
2015/08/19 3 60 CSO S12E64
2015/08/20 8 90 DAC S12E50
2015/08/21 29 330 DKC S13E37
2015/08/22 43 350 DKC S14E23
2015/08/23 49 400 EKC S14E09
2015/08/24 66 760 EKC S15W04
2015/08/25 47 930 FKC S15W18
2015/08/26 40 1190 FKI S15W31
2015/08/27 35 1100 FKC S16W44
2015/08/28 25 890 FKC S15W57
2015/08/29 27 840 FKC S15W69
2015/08/30 16 520 FKC S15W82
2015/08/31 2 80 DAO S15W89
2015/09/01 2 80 DAO S15W99
BCM
159913

The top 10 solar flares from sunspot region 12403

Start Maximum End
1M8.052015/08/2407:2607:3307:35
2M5.042015/08/2221:1921:2421:28
3M4.172015/08/2704:4805:4406:03
4M3.172015/08/2813:0413:1613:23
5M3.032015/08/2818:5619:0319:06
6M2.052015/08/3002:0103:3004:23
7M2.052015/08/2109:3409:4810:07
8M1.772015/08/2206:3906:4906:59
9M1.762015/08/2101:5602:1802:37
10M1.642015/08/2119:1020:3420:50
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AR 4432 5Comet C/2025 R3 (PANSTARRS) 20Unspecified geomagnetic activity 237Incoming & Unnumbered Active Regions 341AR4431 24
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Space weather facts

Last X-flare2026/04/24X2.5
Last M-flare2026/05/07M2.6
Last geomagnetic storm2026/05/05Kp5 (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 2026122.1 +42.8
Last 30 days91.5 -9.6

This day in history*

Solar flares
12024X1.02
22024X1.0
32024X1.0
42024M9.87
52024M8.69
DstG
11960-129G4
22005-110G4
32016-95G2
41993-68G2
51992-64G1
*since 1994

Aurora on this day in history

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