A filament eruption (see video) near earth-facing sunspot region 2345 was associated with yesterday's strongest solar flare: C9.2 at 18:18 UTC. A Type II radio sweep was associated with this event and a faint asymmetrical full halo coronal mass ejection was launched towards Earth and could impact Earth this weekend.
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| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/06 | M8.1 |
| 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 | 175.4 +83.6 |
| Last 30 days | 107.3 +14.6 |