| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 17/09/1998 | 1 | 90 | HSX | N31E81 | |
| 18/09/1998 | 1 | 70 | HAX | N33E68 | |
| 19/09/1998 | 1 | 130 | HAX | N32E57 | |
| 20/09/1998 | 1 | 70 | HSX | N31E43 | |
| 21/09/1998 | 1 | 50 | HSX | N31E31 | |
| 22/09/1998 | 3 | 60 | CSO | N32E18 | |
| 23/09/1998 | 1 | 70 | HSX | N32E05 | |
| 24/09/1998 | 1 | 60 | HAX | N32W08 | |
| 25/09/1998 | 1 | 60 | HSX | N32W21 | |
| 26/09/1998 | 1 | 60 | HSX | N32W32 | |
| 27/09/1998 | 1 | 70 | HSX | N32W45 | |
| 28/09/1998 | 1 | 70 | HSX | N31W58 | |
| 29/09/1998 | 1 | 40 | HSX | N31W72 | |
| 30/09/1998 | 1 | 40 | HSX | N31W84 | |
| 01/10/1998 | 1 | 120 | HSX | N33W96 |
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| Dernière classe X | 18/01/2026 | X1.9 |
| Dernière classe M | 21/01/2026 | M3.4 |
| Dernier orage géomagnétique | 20/01/2026 | Kp8 (G4) |
| 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 | 107.3 -16.8 |
| 30 derniers jours | 113 +4.9 |