| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 05/04/1998 | 7 | 30 | CSO | S22E42 | |
| 06/04/1998 | 16 | 250 | DSI | S22E28 | |
| 07/04/1998 | 20 | 280 | DKI | S22E14 | |
| 08/04/1998 | 21 | 290 | EAO | S23E02 | |
| 09/04/1998 | 18 | 260 | EKO | S23W12 | |
| 10/04/1998 | 20 | 240 | EAO | S23W24 | |
| 11/04/1998 | 10 | 210 | ESO | S23W38 | |
| 12/04/1998 | 7 | 160 | ESO | S23W52 | |
| 13/04/1998 | 3 | 140 | ESO | S22W64 | |
| 14/04/1998 | 2 | 100 | CSO | S21W76 |
| C |
|---|
| 1 |
| Départ | Maximum | Fin | ||||
|---|---|---|---|---|---|---|
| 1 | C1.66 | 05/04/1998 | 11:48 | 11:51 | 11:55 |
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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 | 122.3 +11.2 |