| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2001/09/17 | 3 | 130 | HSX | N12E70 | |
| 2001/09/18 | 2 | 180 | HAX | N13E57 | |
| 2001/09/19 | 3 | 200 | HAX | N12E44 | |
| 2001/09/20 | 6 | 210 | CAO | N12E30 | |
| 2001/09/21 | 9 | 210 | DAO | N12E17 | |
| 2001/09/22 | 10 | 140 | DKO | N11E04 | |
| 2001/09/23 | 6 | 110 | DAO | N12W10 | |
| 2001/09/24 | 5 | 100 | CAO | N12W23 | |
| 2001/09/25 | 5 | 80 | CSO | N12W36 | |
| 2001/09/26 | 2 | 70 | HSX | N12W50 | |
| 2001/09/27 | 1 | 70 | HSX | N12W64 | |
| 2001/09/28 | 1 | 40 | HSX | N12W77 | |
| 2001/09/29 | 1 | 30 | HRX | N12W90 |
| C | M |
|---|---|
| 2 | 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.83 | 2001/09/18 | 15:31 | 15:38 | 15:43 | |
| 2 | C6 | 2001/09/21 | 04:48 | 04:55 | 05:02 | |
| 3 | C3.59 | 2001/09/21 | 01:17 | 01:29 | 01:32 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/27 | M5.1 |
| Last geomagnetic storm | 2025/12/22 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 114.9 +23.1 |
| Last 30 days | 113.2 +27.4 |