Sunspot region AR8739

Number of
sunspots
Size Class Magn. Class Spot Location
1999/10/21 3 50 CAO S14E71
1999/10/22 8 130 DAO S12E58
1999/10/23 19 220 DAI S13E43
1999/10/24 23 440 EKI S12E30
1999/10/25 36 420 EKI S12E16
1999/10/26 55 570 EHI S12E03
1999/10/27 62 800 FKC S11W10
1999/10/28 42 650 FKC S12W23
1999/10/29 35 590 FKI S11W37
1999/10/30 26 500 FHI S12W49
1999/10/31 22 390 FAI S10W64
1999/11/01 8 180 FAO S11W78
1999/11/02 10 180 EAI S12W89
C
11

The top 10 solar flares from sunspot region 8739

Start Maximum End
1C4.531999/10/2614:2014:2414:26
2C3.971999/10/2219:2419:2919:35
3C3.861999/10/2623:1023:1423:21
4C3.371999/10/2118:5519:0219:05
5C3.341999/10/2507:3607:4007:44
6C3.211999/10/2708:5609:0009:05
7C3.091999/10/2110:0110:1110:15
8C3.071999/10/2917:0317:0817:13
9C2.511999/10/2804:5104:5705:07
10C1.741999/10/2509:4109:4909:53

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Last X-flare2025/06/19X1.9
Last M-flare2025/10/03M1.2
Last geomagnetic storm2025/10/03Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
September 2025129.8 -3.7
October 2025140.1 +10.3
Last 30 days131.3 -1.2

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