| Nombre de taches solaires |
Zone | Classe Magn. | Classe Tache | Position | |
|---|---|---|---|---|---|
| 24/05/1998 | 12 | 30 | CRO | N17W12 | |
| 25/05/1998 | 20 | 200 | DAO | N18W28 | |
| 26/05/1998 | 22 | 300 | DAI | N18W38 | |
| 27/05/1998 | 14 | 320 | DKO | N18W52 | |
| 28/05/1998 | 11 | 280 | ESO | N18W66 | |
| 29/05/1998 | 5 | 200 | CSO | N18W81 |
| B | C | M |
|---|---|---|
| 5 | 11 | 3 |
| Départ | Maximum | Fin | ||||
|---|---|---|---|---|---|---|
| 1 | M9.14 | 29/05/1998 | 00:51 | 00:59 | 01:03 | |
| 2 | M1.51 | 28/05/1998 | 13:43 | 13:53 | 14:00 | |
| 3 | M1.15 | 28/05/1998 | 18:59 | 19:12 | 19:18 | |
| 4 | C9.97 | 27/05/1998 | 13:30 | 13:35 | 14:50 | |
| 5 | C4.13 | 28/05/1998 | 04:33 | 04:39 | 04:42 | |
| 6 | C3.49 | 28/05/1998 | 12:50 | 12:55 | 12:57 | |
| 7 | C2.96 | 28/05/1998 | 20:24 | 20:28 | 20:31 | |
| 8 | C2.93 | 28/05/1998 | 22:41 | 22:48 | 22:57 | |
| 9 | C2.41 | 27/05/1998 | 06:05 | 06:11 | 06:20 | |
| 10 | C2.23 | 26/05/1998 | 21:07 | 21:25 | 21:41 |
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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 |