| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1997/09/02 | 1 | 0 | AXX | N22E70 | |
| 1997/09/03 | 1 | 0 | AXX | N21E58 | |
| 1997/09/05 | 1 | 0 | AXX | N22E36 | |
| 1997/09/06 | 11 | 30 | BXO | N21E22 | |
| 1997/09/07 | 10 | 50 | CSO | N21E09 | |
| 1997/09/08 | 10 | 40 | DSO | N21W04 | |
| 1997/09/09 | 7 | 20 | CRO | N21W17 | |
| 1997/09/10 | 4 | 10 | BXO | N21W31 |
| B | C |
|---|---|
| 1 | 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C1.09 | 1997/09/05 | 19:24 | 19:32 | 19:36 | |
| 2 | B6.14 | 1997/09/06 | 11:15 | 11:19 | 11:23 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/10 | M1.9 |
| 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 | 157.7 +65.9 |
| Last 30 days | 108.9 +11.4 |