What a way to sign off! Sunspot region 3664 (R3-strong) is now on the west limb and waves goodbye by producing the largest solar flare of Solar Cycle 25 which peaked at X8.7! Wow! There isn't any coronagraph imagery available from SOHO yet, but we do know the solar flare was eruptive but based on coronagraph imagery from STEREO A, the resulting coronal mass ejection is likely not aimed at Earth.
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| Ultimo brillamento X | 2025/12/08 | X1.1 |
| Ultimo brillamento M | 2025/12/12 | M1.1 |
| Ultima tempesta geomagnetica | 2025/12/12 | Kp5 (G1) |
| Giorni senza macchie | |
|---|---|
| Ultimo giorno senza macchie | 2022/06/08 |
| Media mensile Numero di Macchie Solari | |
|---|---|
| novembre 2025 | 91.8 -22.8 |
| dicembre 2025 | 135.1 +43.3 |
| Ultimi 30 giorni | 107.1 +10.8 |