Sunspot region 2157 is decaying rapidly but it still found the energy for a minor M-class solar flare: M1.57 at 02:16 UTC. There was also a filament eruption back on September 12 which might have launched a Coronal Mass Ejection towards Earth.
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/10 | M1.2 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 157.7 +65.9 |
| Last 30 days | 108.9 +11.4 |