| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2017/02/16 | 2 | 10 | AXX | N11E53 | |
| 2017/02/17 | 2 | 10 | HRX | N11E40 | |
| 2017/02/18 | 4 | 20 | CRO | N11E27 | |
| 2017/02/19 | 3 | 20 | BXO | N11E15 | |
| 2017/02/20 | 1 | 10 | AXX | N11E01 |
| A | B |
|---|---|
| 1 | 3 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | B2.71 | 2017/02/15 | 12:34 | 12:43 | 12:46 | |
| 2 | B1.76 | 2017/02/17 | 09:27 | 09:32 | 09:38 | |
| 3 | B1.29 | 2017/02/17 | 09:53 | 09:56 | 09:58 | |
| 4 | A9.31 | 2017/02/15 | 20:48 | 20:51 | 20:54 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/12 | M1.1 |
| Last geomagnetic storm | 2025/12/11 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 152.4 +60.6 |
| Last 30 days | 108.1 +9.1 |