Sunspot region AR13420
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2023/09/03 | 4 | 30 | CSO | S20E16 | |
| 2023/09/04 | 1 | 20 | CRO | S20E02 | |
| 2023/09/05 | 3 | 10 | AXX | S19W11 | |
| 2023/09/06 | 3 | 10 | AXX | S21W25 |
2023/09/03
2023/09/04
2023/09/05
2023/09/06
|
2023/09/03
2023/09/04
2023/09/05
2023/09/06
|
| C |
|---|
| 1 |
The top 1 solar flares from sunspot region 13420
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C3.9 | 2023/09/05 | 22:13 | 22:22 | 22:46 |
Latest news
Sunday, 7 December 2025
M8.1 solar flare with earth-directed CME
Monday, 1 December 2025
X1.9 solar flare, Coronal hole faces Earth
Friday, 14 November 2025
X4.0 solar flare
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Space weather facts
| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/08 | M1.8 |
| 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 | 162.7 +70.9 |
| Last 30 days | 108 +13.3 |