Sunspot region AR11921
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2013/12/10 | 2 | 120 | HSX | N06E75 | |
| 2013/12/11 | 2 | 350 | HKX | N06E62 | |
| 2013/12/12 | 2 | 350 | HKX | N07E50 | |
| 2013/12/13 | 2 | 360 | HKX | N08E37 | |
| 2013/12/14 | 8 | 350 | CKO | N07E23 | |
| 2013/12/15 | 9 | 380 | CKO | N07E10 | |
| 2013/12/16 | 9 | 400 | HKX | N07W03 | |
| 2013/12/17 | 7 | 300 | CKO | N06W15 | |
| 2013/12/18 | 7 | 300 | CKO | N06W15 | |
| 2013/12/19 | 2 | 220 | DSO | N06W43 | |
| 2013/12/20 | 2 | 220 | HAX | N06W57 | |
| 2013/12/22 | 2 | 180 | HAX | N07W85 | |
| 2013/12/23 | 1 | 60 | HSX | N07W94 | |
| 2013/12/24 | 1 | 60 | HSX | N07W0* |
2013/12/10
2013/12/11
2013/12/12
2013/12/13
2013/12/14
2013/12/15
2013/12/16
2013/12/17
2013/12/18
2013/12/19
2013/12/20
2013/12/22
2013/12/23
2013/12/24
|
2013/12/10
2013/12/11
2013/12/12
2013/12/13
2013/12/14
2013/12/15
2013/12/16
2013/12/17
2013/12/18
2013/12/19
2013/12/20
2013/12/22
2013/12/23
2013/12/24
|
| C |
|---|
| 4 |
The top 4 solar flares from sunspot region 11921
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C8.54 | 2013/12/12 | 22:05 | 22:14 | 22:19 | |
| 2 | C3.77 | 2013/12/09 | 16:51 | 16:56 | 17:02 | |
| 3 | C2.28 | 2013/12/19 | 10:14 | 10:26 | 10:31 | |
| 4 | C2.05 | 2013/12/19 | 08:17 | 08:28 | 08:49 |
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Space weather facts
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| Last M-flare | 2025/12/29 | M1.0 |
| Last geomagnetic storm | 2025/12/22 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
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| December 2025 | 118 +26.2 |
| Last 30 days | 118 +29.4 |