| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2004/09/07 | 5 | 40 | DSI | S10W29 | |
| 2004/09/08 | 11 | 80 | DSO | S11W42 | |
| 2004/09/09 | 17 | 190 | DAI | S10W55 | |
| 2004/09/10 | 13 | 300 | DAO | S09W68 | |
| 2004/09/11 | 11 | 370 | DKI | S09W81 | |
| 2004/09/12 | 2 | 170 | HSX | S09W94 |
| C |
|---|
| 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C1.34 | 2004/09/09 | 17:55 | 18:00 | 18:13 |
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| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/04/28 | M1.11 |
| Last geomagnetic storm | 2026/04/20 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| May 2026 | 145.5 +66.2 |
| Last 30 days | 91 -4.3 |