| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2001/09/18 | 5 | 40 | DSO | N12E34 | |
| 2001/09/19 | 4 | 20 | DSO | N12E20 | |
| 2001/09/20 | 5 | 30 | CSO | N13E08 | |
| 2001/09/21 | 14 | 60 | DAO | N13W05 | |
| 2001/09/22 | 17 | 80 | DAO | N12W18 | |
| 2001/09/23 | 27 | 300 | DKI | N12W32 | |
| 2001/09/24 | 23 | 330 | DKI | N13W45 | |
| 2001/09/25 | 15 | 270 | EAO | N13W59 | |
| 2001/09/26 | 6 | 200 | DAO | N13W73 | |
| 2001/09/27 | 3 | 180 | DSO | N13W86 |
| C |
|---|
| 2 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C6.32 | 2001/09/23 | 01:02 | 01:06 | 01:08 | |
| 2 | C5.3 | 2001/09/22 | 22:01 | 22:07 | 22:18 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/04 | M1.7 |
| 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 | 133.3 +47.4 |
| Last 30 days | 96.1 +32 |