| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2001/09/23 | 4 | 90 | DAO | N12E76 | |
| 2001/09/24 | 4 | 230 | FAO | N12E68 | |
| 2001/09/25 | 5 | 120 | DAO | N12E54 | |
| 2001/09/26 | 11 | 80 | DAO | N12E41 | |
| 2001/09/27 | 7 | 90 | DAO | N12E24 | |
| 2001/09/28 | 8 | 110 | DAO | N12E11 | |
| 2001/09/29 | 9 | 80 | DSO | N12W02 | |
| 2001/09/30 | 6 | 60 | DAO | N12W15 | |
| 2001/10/01 | 7 | 70 | DAO | N12W29 | |
| 2001/10/02 | 10 | 70 | CAO | N11W38 | |
| 2001/10/03 | 4 | 50 | HSX | N12W51 | |
| 2001/10/04 | 6 | 60 | CAO | N11W63 | |
| 2001/10/05 | 4 | 110 | CAO | N12W76 |
| C | M |
|---|---|
| 4 | 2 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.72 | 2001/09/28 | 21:15 | 21:25 | 21:34 | |
| 2 | M1.21 | 2001/09/28 | 17:51 | 18:42 | 18:51 | |
| 3 | C5.53 | 2001/10/02 | 15:38 | 15:49 | 16:01 | |
| 4 | C4.88 | 2001/10/03 | 16:48 | 17:08 | 17:15 | |
| 5 | C4.45 | 2001/10/04 | 11:53 | 12:33 | 13:12 | |
| 6 | C3.85 | 2001/10/03 | 19:21 | 19:25 | 19:31 |
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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 | 118.8 +32.8 |
| Last 30 days | 102.1 +47 |