| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/12/20 | 2 | 0 | BXO | S19E06 | |
| 1999/12/21 | 2 | 0 | AXX | S18W08 | |
| 1999/12/24 | 1 | 10 | HAX | S18W47 |
| C |
|---|
| 1 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C5.34 | 1999/12/23 | 19:52 | 19:55 | 19:57 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/10 | M1.6 |
| 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 |