Sunspot region AR8639
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/07/20 | 5 | 10 | BXO | N38W14 | |
| 1999/07/21 | 5 | 20 | BXO | N39W26 | |
| 1999/07/22 | 11 | 50 | DSO | N38W37 | |
| 1999/07/23 | 12 | 400 | DAI | N38W50 | |
| 1999/07/24 | 13 | 390 | DKO | N38W62 | |
| 1999/07/25 | 14 | 290 | DAO | N38W74 | |
| 1999/07/26 | 8 | 230 | DAO | N38W87 |
| C | M |
|---|---|
| 1 | 2 |
The top 3 solar flares from sunspot region 8639
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M3.44 | 1999/07/25 | 13:08 | 13:38 | 14:17 | |
| 2 | M1.1 | 1999/07/24 | 20:40 | 20:48 | 20:59 | |
| 3 | C3.69 | 1999/07/22 | 02:32 | 02:39 | 02:46 |
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Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/06 | M8.1 |
| 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 | 167.7 +75.9 |
| Last 30 days | 107.1 +13.7 |