| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2013/09/12 | 1 | 30 | HSX | S05E69 | |
| 2013/09/13 | 1 | 40 | CAO | S06E54 | |
| 2013/09/14 | 3 | 50 | CSO | S06E41 | |
| 2013/09/15 | 3 | 40 | CSO | S06E28 | |
| 2013/09/16 | 2 | 30 | HAX | S05E14 | |
| 2013/09/17 | 1 | 30 | HSX | S04E02 | |
| 2013/09/18 | 1 | 30 | HSX | S04W12 | |
| 2013/09/19 | 1 | 20 | HSX | S04W25 | |
| 2013/09/20 | 1 | 10 | HRX | S04W38 | |
| 2013/09/21 | 1 | 10 | HRX | S04W52 | |
| 2013/09/22 | 1 | 10 | HRX | S04W65 | |
| 2013/09/23 | 1 | 10 | HRX | S04W78 |
| B |
|---|
| 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | B3.21 | 2013/09/12 | 10:58 | 11:06 | 11:16 |
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| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/06 | M8.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 175.4 +83.6 |
| Last 30 days | 106.4 +12.9 |