| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 15/10/1998 | 10 | 100 | DSO | S19W12 | |
| 16/10/1998 | 14 | 270 | DSI | S19W25 | |
| 17/10/1998 | 18 | 340 | DSO | S18W39 | |
| 18/10/1998 | 8 | 390 | DKO | S19W52 | |
| 19/10/1998 | 5 | 290 | DHO | S19W64 | |
| 20/10/1998 | 6 | 180 | EHO | S20W78 | |
| 21/10/1998 | 1 | 120 | HKX | S18W92 |
| B | C |
|---|---|
| 1 | 2 |
| Départ | Maximum | Fin | ||||
|---|---|---|---|---|---|---|
| 1 | C1.54 | 16/10/1998 | 06:37 | 06:45 | 07:00 | |
| 2 | C1.02 | 14/10/1998 | 18:14 | 18:18 | 18:20 | |
| 3 | B6.04 | 14/10/1998 | 14:41 | 14:44 | 14:47 |
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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 | 119.4 -4.6 |
| 30 derniers jours | 121.8 +8.9 |