Sunspot region AR11728

Number of
sunspots
Size Class Magn. Class Spot Location
2013/04/23 2 40 CSO N19E62
2013/04/24 1 60 HSX N19E48
2013/04/25 1 50 HSX N19E37
2013/04/26 2 60 HSX N19E24
2013/04/27 3 20 HRX N19E11
2013/04/28 1 20 HRX N19W02
2013/04/29 1 20 HRX N19W16
2013/04/30 1 20 HRX N19W30
2013/05/01 1 10 AXX N19W44
2013/05/02 1 10 AXX N19W58
2013/05/03 1 10 AXX N19W72
2013/05/04 2 10 BXO N20W85
2013/05/05 2 10 BXO N20W99

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Space weather facts

Last X-flare2026/01/18X1.9
Last M-flare2026/01/21M3.4
Last geomagnetic storm2026/01/22Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
December 2025124 +32.2
January 2026117.9 -6.1
Last 30 days121.2 +12.1

This day in history*

Solar flares
12003M2.74
22025M2.7
32024M2.6
42001M1.56
52024M1.4
DstG
11979-88G2
21957-71G1
32001-61G1
42004-52G1
51999-50
*since 1994

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