| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 18/09/1998 | 3 | 10 | BXO | S17E42 | |
| 19/09/1998 | 7 | 20 | CRO | S16E30 | |
| 20/09/1998 | 7 | 50 | CSO | S17E16 | |
| 21/09/1998 | 7 | 50 | CSO | S16E01 | |
| 22/09/1998 | 1 | 50 | HAX | S16W15 | |
| 23/09/1998 | 10 | 50 | ESO | S16W25 | |
| 24/09/1998 | 4 | 30 | CRO | S16W38 | |
| 25/09/1998 | 1 | 0 | AXX | S16W56 | |
| 27/09/1998 | 4 | 80 | BXO | S14W71 | |
| 28/09/1998 | 3 | 80 | DSO | S15W84 |
| C |
|---|
| 2 |
| Départ | Maximum | Fin | ||||
|---|---|---|---|---|---|---|
| 1 | C2.71 | 27/09/1998 | 03:55 | 04:00 | 04:02 | |
| 2 | C1.43 | 26/09/1998 | 14:56 | 15:01 | 15:06 |
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| Dernière classe X | 08/12/2025 | X1.1 |
| Dernière classe M | 31/12/2025 | M7.11 |
| Dernier orage géomagnétique | 02/01/2026 | 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 | 113.6 -10.4 |
| 30 derniers jours | 106.8 -1.2 |