| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 16/08/1998 | 1 | 90 | HSX | S30E64 | |
| 17/08/1998 | 2 | 100 | CSO | S30E53 | |
| 18/08/1998 | 4 | 110 | CAO | S30E42 | |
| 19/08/1998 | 5 | 110 | CSO | S30E29 | |
| 20/08/1998 | 4 | 90 | CSO | S30E16 | |
| 21/08/1998 | 5 | 70 | CSO | S27E03 | |
| 22/08/1998 | 4 | 50 | CSO | S28W11 | |
| 23/08/1998 | 5 | 40 | CSO | S26W24 | |
| 24/08/1998 | 2 | 30 | CSO | S27W38 | |
| 25/08/1998 | 1 | 30 | HSX | S29W52 | |
| 26/08/1998 | 1 | 40 | AXX | S25W66 | |
| 27/08/1998 | 1 | 20 | AXX | S29W78 |
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| Dernière classe X | 18/01/2026 | X1.9 |
| Dernière classe M | 21/01/2026 | M3.4 |
| Dernier orage géomagnétique | 22/01/2026 | 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 | 119.6 -4.4 |
| 30 derniers jours | 122 +9.1 |