| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 10/12/1999 | 8 | 10 | BXO | S16E11 | |
| 11/12/1999 | 1 | 20 | HSX | S16W04 | |
| 12/12/1999 | 5 | 10 | BXO | S16W17 | |
| 13/12/1999 | 1 | 0 | AXX | S17W33 | |
| 14/12/1999 | 1 | 0 | AXX | S17W46 | |
| 16/12/1999 | 1 | 0 | AXX | S16W70 |
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| Dernière classe X | 08/12/2025 | X1.1 |
| Dernière classe M | 12/12/2025 | M1.1 |
| Dernier orage géomagnétique | 12/12/2025 | Kp5 (G1) |
| Jours sans taches solaires | |
|---|---|
| Dernier jour sans taches solaires | 08/06/2022 |
| Nombre mensuel moyen de taches solaires | |
|---|---|
| novembre 2025 | 91.8 -22.8 |
| décembre 2025 | 139.6 +47.8 |
| 30 derniers jours | 106.8 +8.5 |