| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 11/12/1999 | 4 | 70 | DAO | S12E06 | |
| 12/12/1999 | 10 | 60 | DAO | S12W08 | |
| 13/12/1999 | 4 | 40 | DAO | S13W21 | |
| 14/12/1999 | 4 | 10 | BXO | S13W34 | |
| 15/12/1999 | 3 | 30 | DRO | S14W47 |
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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 | 144.3 +52.5 |
| 30 derniers jours | 107.9 +9.5 |