| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1997/09/06 | 2 | 10 | BXO | N22E64 | |
| 1997/09/07 | 1 | 10 | HRX | N22E51 | |
| 1997/09/08 | 3 | 10 | HRX | N21E36 | |
| 1997/09/09 | 15 | 70 | CAO | N21E26 | |
| 1997/09/10 | 19 | 170 | DAI | N22E13 | |
| 1997/09/11 | 22 | 270 | DSI | N22W01 | |
| 1997/09/12 | 20 | 240 | EAI | N22W13 | |
| 1997/09/13 | 22 | 240 | EAO | N22W26 | |
| 1997/09/14 | 16 | 230 | EAO | N22W39 | |
| 1997/09/15 | 12 | 270 | ESO | N22W53 | |
| 1997/09/16 | 10 | 240 | DAO | N21W64 | |
| 1997/09/17 | 6 | 270 | EAO | N22W77 | |
| 1997/09/18 | 6 | 80 | DRO | N22W88 |
| B | C | M |
|---|---|---|
| 4 | 8 | 2 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M2.26 | 1997/09/17 | 11:35 | 11:43 | 11:52 | |
| 2 | M1.35 | 1997/09/17 | 17:45 | 18:03 | 18:27 | |
| 3 | C6.33 | 1997/09/15 | 02:02 | 02:14 | 02:27 | |
| 4 | C4.49 | 1997/09/16 | 22:06 | 22:22 | 22:38 | |
| 5 | C4.07 | 1997/09/15 | 06:38 | 06:54 | 07:06 | |
| 6 | C1.66 | 1997/09/12 | 18:55 | 19:00 | 19:04 | |
| 7 | C1.56 | 1997/09/12 | 02:07 | 02:11 | 02:13 | |
| 8 | C1.34 | 1997/09/12 | 20:04 | 20:09 | 20:11 | |
| 9 | C1.33 | 1997/09/14 | 20:11 | 20:16 | 20:32 | |
| 10 | C1.11 | 1997/09/12 | 00:16 | 00:28 | 00:30 |
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| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| 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 | 186 +94.2 |
| Last 30 days | 106.3 +12.6 |