A major X2.9 solar flare (R3-strong) took place today peaking at 07:08 UTC. The flare came from a sunspot region just behind the south-east limb. This is likely the anticipated return of old sunspot region 3664 which was the source of many major X-class solar flares during its previous visit of the earth-facing solar disk and an extreme G5 geomagnetic storm which was the first of its kind in 21 years.
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Last X-flare | 2025/03/28 | X1.1 |
Last M-flare | 2025/03/29 | M1.9 |
Last geomagnetic storm | 2025/03/27 | Kp5 (G1) |
Spotless days | |
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Last spotless day | 2022/06/08 |
Monthly mean Sunspot Number | |
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February 2025 | 154.6 +17.6 |
March 2025 | 128.3 -26.4 |
Last 30 days | 128.3 -24 |