| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2011/09/12 | 2 | 40 | BXO | N08E66 | |
| 2011/09/13 | 3 | 10 | BXO | N08E52 | |
| 2011/09/14 | 5 | 50 | CAO | N09E38 | |
| 2011/09/15 | 2 | 30 | CRO | N08E24 | |
| 2011/09/16 | 1 | 20 | HRX | N10E08 | |
| 2011/09/17 | 1 | 20 | HRX | N09W04 | |
| 2011/09/18 | 1 | 20 | HRX | N10W17 |
| C |
|---|
| 2 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C2.86 | 2011/09/12 | 03:24 | 03:29 | 03:33 | |
| 2 | C2.42 | 2011/09/12 | 02:22 | 02:26 | 02:30 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 107.7 +21.8 |
| Last 30 days | 100 +44.8 |