| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 28/12/1998 | 6 | 10 | BXO | N23W28 | |
| 29/12/1998 | 2 | 40 | HSX | N22W44 | |
| 30/12/1998 | 1 | 30 | HSX | N22W57 | |
| 31/12/1998 | 1 | 30 | HSX | N21W72 |
| C |
|---|
| 1 |
| Départ | Maximum | Fin | ||||
|---|---|---|---|---|---|---|
| 1 | C3.97 | 27/12/1998 | 23:38 | 23:42 | 23:46 |
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| Dernière classe X | 08/12/2025 | X1.1 |
| Dernière classe M | 31/12/2025 | M7.11 |
| Dernier orage géomagnétique | 02/01/2026 | Kp5 (G1) |
| Jours sans taches solaires | |
|---|---|
| Dernier jour sans taches solaires | 08/06/2022 |
| Nombre mensuel moyen de taches solaires | |
|---|---|
| décembre 2025 | 124 +32.2 |
| janvier 2026 | 106.7 -17.3 |
| 30 derniers jours | 101.8 -7.7 |