| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 10/04/1998 | 5 | 20 | BXO | S21E56 | |
| 11/04/1998 | 11 | 20 | BXO | S21E43 | |
| 12/04/1998 | 7 | 20 | BXO | S21E29 | |
| 13/04/1998 | 6 | 20 | BXO | S23E17 | |
| 14/04/1998 | 3 | 10 | BXO | S26E06 | |
| 15/04/1998 | 8 | 30 | BXO | S26W07 | |
| 16/04/1998 | 9 | 40 | CSO | S24W21 | |
| 17/04/1998 | 5 | 10 | BXO | S23W33 | |
| 18/04/1998 | 4 | 10 | BXO | S24W47 |
| B | C |
|---|---|
| 1 | 3 |
| Départ | Maximum | Fin | ||||
|---|---|---|---|---|---|---|
| 1 | C1.76 | 13/04/1998 | 03:32 | 03:50 | 04:03 | |
| 2 | C1.31 | 16/04/1998 | 02:19 | 02:23 | 02:32 | |
| 3 | C1.27 | 12/04/1998 | 06:26 | 06:31 | 06:35 | |
| 4 | B6.97 | 12/04/1998 | 16:16 | 16:24 | 16:34 |
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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 |