Sunspot region AR8402

Number of
sunspots
Size Class Magn. Class Spot Location
1998/12/02 6 390 EAO N17E64
1998/12/03 9 370 FAO N18E53
1998/12/04 12 270 FAO N18E39
1998/12/05 10 270 FKO N16E26
1998/12/06 10 360 EKO N16E10
1998/12/07 12 250 DKO N16W02
1998/12/08 10 230 DAO N17W17
1998/12/09 11 160 DSO N17W31
1998/12/10 6 120 DSO N16W45
1998/12/11 5 120 DSO N17W56
1998/12/12 3 100 DSO N16W71
1998/12/13 1 60 HSX N17W81
1998/12/14 1 50 HSX N17W93
C
9

The top 9 solar flares from sunspot region 8402

Start Maximum End
1C7.31998/12/0118:0018:1618:41
2C2.591998/12/0915:3415:4715:52
3C2.561998/12/0703:5704:0804:16
4C1.891998/12/0411:0211:0611:10
5C1.861998/12/0209:0509:0909:12
6C1.861998/12/0709:4610:0110:14
7C1.791998/12/0905:0305:1105:14
8C1.441998/12/0614:4014:4614:52
9C1.31998/12/0708:5308:5809:03

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Last X-flare2026/04/24X2.5
Last M-flare2026/05/22M2.3
Last geomagnetic storm2026/05/16Kp6- (G2)
Spotless days
Last 365 days3 days
20263 days (2%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
April 202679.3 -6.6
May 202688.6 +9.3
Last 30 days100.4 +10.3

This day in history*

Solar flares
12013M7.24
22024M2.32
32026M2.3
42023M1.9
52024M1.5
DstG
11992-102G2
21990-90G1
31979-74G1
42003-73G1
51978-68G1
*since 1994

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