Sunspot region AR13309
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2023/05/17 | 4 | 20 | CRO | S20W53 | |
| 2023/05/18 | 1 | 10 | AXX | S19W64 | |
| 2023/05/19 | 3 | 10 | BXO | S17W73 | |
| 2023/05/20 | 3 | 10 | BXO | S18W91 |
2023/05/17
2023/05/18
2023/05/19
2023/05/20
|
2023/05/17
2023/05/18
2023/05/19
2023/05/20
|
| C |
|---|
| 1 |
The top 1 solar flares from sunspot region 13309
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C4.3 | 2023/05/17 | 15:19 | 15:30 | 15:53 |
Latest news
Sunday, 1 February 2026
Complex sunspot region 4366
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Sunday, 18 January 2026
X1.9 solar flare with earth-directed CME
Latest forum messages
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/02/25 | M2.4 |
| Last geomagnetic storm | 2026/02/22 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (5%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| January 2026 | 112.6 -11.4 |
| February 2026 | 75.5 -37.1 |
| Last 30 days | 81.7 -39.4 |