Sunspot region AR11931
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2013/12/19 | 1 | 100 | HAX | S14E76 | |
| 2013/12/20 | 1 | 210 | HAX | S15E62 | |
| 2013/12/22 | 2 | 220 | HSX | S15E36 | |
| 2013/12/23 | 1 | 170 | HSX | S15E21 | |
| 2013/12/24 | 1 | 190 | HAX | S14E08 | |
| 2013/12/25 | 1 | 210 | HAX | S15W04 | |
| 2013/12/26 | 5 | 230 | HAX | S16W16 | |
| 2013/12/27 | 3 | 170 | CAO | S15W29 | |
| 2013/12/28 | 3 | 160 | CAO | S15W43 | |
| 2013/12/29 | 1 | 140 | HSX | S15W58 | |
| 2013/12/30 | 1 | 110 | HSX | S14W73 | |
| 2013/12/31 | 1 | 130 | HAX | S14W87 | |
| 2014/01/01 | 1 | 130 | HAX | S14W0* |
2013/12/19
2013/12/20
2013/12/22
2013/12/23
2013/12/24
2013/12/25
2013/12/26
2013/12/27
2013/12/28
2013/12/29
2013/12/30
2013/12/31
2014/01/01
|
2013/12/19
2013/12/20
2013/12/22
2013/12/23
2013/12/24
2013/12/25
2013/12/26
2013/12/27
2013/12/28
2013/12/29
2013/12/30
2013/12/31
2014/01/01
|
| C |
|---|
| 2 |
The top 2 solar flares from sunspot region 11931
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C3.15 | 2013/12/26 | 06:55 | 07:02 | 07:07 | |
| 2 | C1.89 | 2013/12/19 | 19:08 | 19:12 | 19:15 |
Latest news
Monday, 30 March 2026
X1.5 solar flare
Tuesday, 17 March 2026
M2.7 solar flare, CME arrival possible
Sunday, 1 February 2026
Complex sunspot region 4366
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AR4420 12Incoming & Unnumbered Active Regions 278Current Farside Activity 460Coronal Holes 42/44 97AR potential 4420 (not officially named yet) 5
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| Last geomagnetic storm | 2026/04/20 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 79.3 -6.7 |
| Last 30 days | 92.3 +25.9 |
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