Sunspot region AR8477

Number of
sunspots
Size Class Magn. Class Spot Location
1999/03/01 4 30 CSO S25E77
1999/03/02 5 100 DAO S26E64
1999/03/03 4 110 DSO S26E53
1999/03/04 5 110 DSO S26E40
1999/03/05 13 130 EAO S32E28
1999/03/06 21 150 EAO S26E15
1999/03/07 21 150 ESO S29E01
1999/03/08 17 90 CSO S25W10
1999/03/09 14 120 DSO S27W18
1999/03/10 17 100 DSO S28W33
1999/03/11 9 160 DAO S28W46
1999/03/12 7 200 CSO S29W58
1999/03/13 2 180 HHX S30W68
1999/03/14 2 170 HSX S28W82
1999/03/15 1 180 HAX S28W94
C
3

The top 3 solar flares from sunspot region 8477

Start Maximum End
1C4.261999/03/0703:5404:0804:15
2C1.491999/03/0415:5916:0916:15
3C1.231999/03/1016:1016:1416:18

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Space weather facts

Last X-flare2026/03/30X1.5
Last M-flare2026/04/23M4.9
Last geomagnetic storm2026/04/20Kp5 (G1)
Spotless days
Last 365 days3 days
20263 days (3%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
March 202685.9 +7.7
April 202678.4 -7.5
Last 30 days90 +16.2

This day in history*

Solar flares
12003M4.84
22001M4.48
32001M3.35
42001M3.06
52001M2.7
DstG
12023-213G4
21960-171G3
32012-120G3
41990-106G2
51959-92G1
*since 1994

Aurora on this day in history

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