| Numero di macchie solari |
Dimensione | Classe Magn. | Classe Macchia | Posizione | |
|---|---|---|---|---|---|
| 1999/04/13 | 10 | 30 | BXO | S33E08 | |
| 1999/04/14 | 11 | 40 | CAO | S33W06 | |
| 1999/04/15 | 8 | 30 | CAO | S34W24 | |
| 1999/04/16 | 7 | 20 | BXO | S33W33 | |
| 1999/04/17 | 3 | 30 | CSO | S32W47 | |
| 1999/04/18 | 9 | 80 | EAO | S30W58 | |
| 1999/04/19 | 6 | 30 | BXO | S33W69 | |
| 1999/04/20 | 1 | 10 | AXX | S31W85 |
| B |
|---|
| 2 |
| Inizio | Massimo | Fine | ||||
|---|---|---|---|---|---|---|
| 1 | B8.64 | 1999/04/17 | 23:35 | 23:42 | 23:47 | |
| 2 | B6.7 | 1999/04/17 | 20:30 | 20:38 | 20:44 |
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| Ultimo brillamento X | 2026/04/24 | X2.5 |
| Ultimo brillamento M | 2026/05/10 | M5.7 |
| Ultima tempesta geomagnetica | 2026/05/05 | Kp5 (G1) |
| Giorni senza macchie | |
|---|---|
| Ultimi 365 giorni | 3 giorni |
| 2026 | 3 giorni (2%) |
| Ultimo giorno senza macchie | 2026/02/24 |
| Media mensile Numero di Macchie Solari | |
|---|---|
| aprile 2026 | 79.3 -6.6 |
| maggio 2026 | 112.3 +33 |
| Ultimi 30 giorni | 94.3 -3.8 |