| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2011/04/13 | 1 | 60 | HSX | N09E71 | |
| 2011/04/14 | 1 | 140 | HSX | N08E56 | |
| 2011/04/15 | 3 | 100 | CAO | N08E45 | |
| 2011/04/16 | 2 | 100 | HAX | N08E31 | |
| 2011/04/17 | 1 | 90 | HAX | N08E15 | |
| 2011/04/18 | 5 | 70 | CSO | N08E07 | |
| 2011/04/19 | 7 | 70 | CSO | N08W07 | |
| 2011/04/20 | 5 | 50 | CSO | N08W24 | |
| 2011/04/21 | 1 | 15 | HRX | N07W39 | |
| 2011/04/22 | 1 | 10 | HRX | N08W52 | |
| 2011/04/23 | 3 | 10 | AXX | N08W66 |
| C |
|---|
| 4 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C2.76 | 2011/04/13 | 03:21 | 03:30 | 03:36 | |
| 2 | C2.66 | 2011/04/12 | 12:21 | 12:32 | 12:38 | |
| 3 | C1.78 | 2011/04/13 | 07:55 | 07:59 | 08:03 | |
| 4 | C1.37 | 2011/04/12 | 17:52 | 17:58 | 18:02 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/04 | 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 | 128.3 +42.3 |
| Last 30 days | 97.5 +35.7 |