Sunspot region AR8640
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/07/21 | 1 | 40 | HSX | N17E76 | |
| 1999/07/22 | 1 | 80 | HSX | N17E63 | |
| 1999/07/23 | 1 | 90 | HSX | N17E49 | |
| 1999/07/24 | 1 | 110 | HSX | N17E37 | |
| 1999/07/25 | 1 | 120 | HAX | N17E24 | |
| 1999/07/26 | 1 | 90 | HSX | N17E10 | |
| 1999/07/27 | 1 | 90 | HSX | N17W03 | |
| 1999/07/28 | 1 | 90 | HSX | N17W16 | |
| 1999/07/29 | 2 | 70 | HSX | N17W28 | |
| 1999/07/30 | 7 | 110 | CSO | N16W42 | |
| 1999/07/31 | 4 | 100 | CSO | N16W55 | |
| 1999/08/01 | 3 | 90 | CSO | N17W69 | |
| 1999/08/02 | 1 | 60 | HSX | N18W82 | |
| 1999/08/03 | 1 | 10 | HSX | N17W94 |
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Space weather facts
| 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 | 175.4 +83.6 |
| Last 30 days | 107.3 +14.6 |