Sunspot region AR11257
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2011/07/18 | 12 | 50 | DAI | N19W56 | |
| 2011/07/19 | 12 | 120 | DSI | N20W69 | |
| 2011/07/20 | 3 | 240 | DSO | N20W83 |
| B | C |
|---|---|
| 3 | 1 |
The top 4 solar flares from sunspot region 11257
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C1.12 | 2011/07/17 | 18:52 | 19:26 | 19:46 | |
| 2 | B6.85 | 2011/07/17 | 07:52 | 08:22 | 08:28 | |
| 3 | B5.68 | 2011/07/17 | 11:28 | 11:32 | 11:36 | |
| 4 | B4.86 | 2011/07/17 | 10:26 | 10:29 | 10:32 |
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
AR4366 426Do the high-resolution sunspot counts point to more complex sunspots? 43Space Weather Memes 781Incoming & Unnumbered Active Regions 141Current Farside Activity 350
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Space weather facts
| Last X-flare | 2026/02/02 | X2.9 |
| Last M-flare | 2026/02/01 | M1.3 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| Last 30 days | 119 +4.2 |