| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 24/02/1998 | 4 | 20 | BXO | N17E14 | |
| 25/02/1998 | 16 | 70 | DAI | N16E01 | |
| 26/02/1998 | 19 | 130 | DAO | N17W12 | |
| 27/02/1998 | 18 | 120 | DAI | N16W25 | |
| 28/02/1998 | 15 | 90 | DAO | N17W37 | |
| 01/03/1998 | 5 | 30 | CRO | N16W51 | |
| 02/03/1998 | 4 | 60 | CSO | N15W66 | |
| 03/03/1998 | 1 | 20 | AXX | N15W82 |
| B | C |
|---|---|
| 4 | 1 |
| Départ | Maximum | Fin | ||||
|---|---|---|---|---|---|---|
| 1 | C1.31 | 24/02/1998 | 13:31 | 13:40 | 13:45 | |
| 2 | B7.54 | 24/02/1998 | 10:39 | 10:46 | 10:48 | |
| 3 | B6.97 | 24/02/1998 | 09:25 | 09:31 | 09:37 | |
| 4 | B6.27 | 24/02/1998 | 12:35 | 12:39 | 12:41 | |
| 5 | B6.11 | 24/02/1998 | 11:30 | 11:51 | 11:54 |
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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 | 119.1 -4.9 |
| 30 derniers jours | 122.3 +12.7 |