| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 05/09/1998 | 2 | 10 | AXX | S18E72 | |
| 06/09/1998 | 2 | 100 | HSX | S17E58 | |
| 07/09/1998 | 5 | 120 | CSO | S16E45 | |
| 08/09/1998 | 10 | 100 | CSO | S17E33 | |
| 09/09/1998 | 11 | 160 | CSO | S18E20 | |
| 10/09/1998 | 10 | 140 | CSO | S18E08 | |
| 11/09/1998 | 5 | 90 | CSO | S17W08 | |
| 12/09/1998 | 6 | 90 | CSO | S18W20 | |
| 13/09/1998 | 4 | 80 | CSO | S18W34 | |
| 14/09/1998 | 3 | 80 | CSO | S18W47 | |
| 15/09/1998 | 2 | 60 | HSX | S17W61 | |
| 16/09/1998 | 1 | 40 | HSX | S17W75 | |
| 17/09/1998 | 1 | 10 | AXX | S15W89 |
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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 | 119.3 -4.8 |
| 30 derniers jours | 108.9 +1.7 |