| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1997/11/12 | 4 | 40 | CSO | N28W44 | |
| 1997/11/13 | 3 | 40 | CAO | N28W56 | |
| 1997/11/14 | 5 | 60 | CSO | N28W71 | |
| 1997/11/15 | 1 | 20 | HRX | N28W84 |
| B | C |
|---|---|
| 2 | 2 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C1.33 | 1997/11/13 | 17:40 | 17:46 | 17:54 | |
| 2 | C1.05 | 1997/11/14 | 15:05 | 15:09 | 15:14 | |
| 3 | B9.36 | 1997/11/13 | 19:23 | 19:27 | 19:31 | |
| 4 | B5.09 | 1997/11/15 | 11:52 | 11:55 | 11:58 |
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| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/04/28 | M1.11 |
| Last geomagnetic storm | 2026/04/20 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| May 2026 | 158 +78.7 |
| Last 30 days | 90.5 -3.1 |