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Sunspot region 2740, C9.9 solar flare
Almost an M-class solar flare! Sunspot region 2740 (Beta-Delta) produced a very impulsive C-class solar flare this morning at 05:10 UTC. The solar flare peaked at an X-ray flux of C9.97 which is just shy of the M-class threshold. The eruption was associated with an Type II Radio Emission and several more C-class solar flares occurred as the day progressed.
Latest news
Wednesday, 14 May 2025
Another X-flare! Potent sunspot region 4087!
Tuesday, 13 May 2025
X1.1 solar flare from sunspot region 4086
Tuesday, 15 April 2025
CME arrival, G3 storm watch
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Incoming & Unnumbered Active Regions 1883AR4087 86Unspecified geomagnetic activity 2426AR4086 49AR 14079 170
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Space weather facts
| Last X-flare | 2025/05/14 | X2.7 |
| Last M-flare | 2025/05/14 | M4.6 |
| Last geomagnetic storm | 2025/05/03 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2025 | 140.6 +6.4 |
| May 2025 | 74.9 -65.7 |
| Last 30 days | 99.8 -31.1 |