| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1997/04/15 | 2 | 10 | CRO | S23E20 | |
| 1997/04/16 | 13 | 40 | CRO | S22E06 | |
| 1997/04/19 | 3 | 10 | BXO | S23W34 |
| B | C |
|---|---|
| 4 | 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C2.07 | 1997/04/15 | 14:00 | 14:20 | 14:26 | |
| 2 | B9 | 1997/04/15 | 09:57 | 10:02 | 10:05 | |
| 3 | B7.79 | 1997/04/15 | 10:10 | 10:19 | 10:30 | |
| 4 | B4.53 | 1997/04/15 | 20:04 | 20:07 | 20:09 | |
| 5 | B2.21 | 1997/04/15 | 06:41 | 06:45 | 06:47 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/12 | M1.1 |
| Last geomagnetic storm | 2025/12/12 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 144.3 +52.5 |
| Last 30 days | 107.5 +8.8 |