| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1997/12/09 | 6 | 20 | BXO | N32E00 | |
| 1997/12/10 | 8 | 50 | CRO | N32W13 | |
| 1997/12/11 | 8 | 110 | DAO | N33W25 | |
| 1997/12/12 | 15 | 100 | DSO | N32W38 | |
| 1997/12/13 | 8 | 80 | DAO | N33W49 | |
| 1997/12/14 | 6 | 90 | CAO | N31W63 | |
| 1997/12/15 | 2 | 70 | CAO | N31W81 | |
| 1997/12/16 | 1 | 10 | AXX | N32W88 |
| C |
|---|
| 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C1.94 | 1997/12/12 | 07:14 | 07:19 | 07:25 |
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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 |