Sunspot region AR12911
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2021/12/16 | 3 | 20 | CRO | N19E70 | |
| 2021/12/17 | 4 | 80 | CAO | N21E54 | |
| 2021/12/18 | 6 | 80 | CAO | N21E39 | |
| 2021/12/19 | 3 | 50 | HAX | N20E24 | |
| 2021/12/20 | 2 | 20 | HRX | N21E13 | |
| 2021/12/21 | 1 | 20 | HRX | N19E17 | |
| 2021/12/22 | 1 | 10 | AXX | N20W12 | |
| 2021/12/23 | 1 | 10 | AXX | N20W26 | |
| 2021/12/24 | 1 | 10 | AXX | N20W39 |
2021/12/16
2021/12/17
2021/12/18
2021/12/19
2021/12/20
2021/12/21
2021/12/22
2021/12/23
2021/12/24
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2021/12/16
2021/12/17
2021/12/18
2021/12/19
2021/12/20
2021/12/21
2021/12/22
2021/12/23
2021/12/24
|
| B | C | M |
|---|---|---|
| 1 | 10 | 1 |
The top 10 solar flares from sunspot region 12911
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.29 | 2021/12/17 | 00:39 | 00:51 | 00:56 | |
| 2 | C3.0 | 2021/12/16 | 20:29 | 20:44 | 21:06 | |
| 3 | C2.3 | 2021/12/16 | 19:58 | 20:09 | 20:20 | |
| 4 | C2.0 | 2021/12/16 | 13:34 | 13:41 | 13:45 | |
| 5 | C1.5 | 2021/12/17 | 03:25 | 03:31 | 03:41 | |
| 6 | C1.5 | 2021/12/17 | 17:39 | 17:53 | 18:08 | |
| 7 | C1.4 | 2021/12/17 | 05:06 | 05:10 | 05:15 | |
| 8 | C1.3 | 2021/12/17 | 04:50 | 04:58 | 05:02 | |
| 9 | C1.3 | 2021/12/17 | 06:18 | 06:25 | 06:30 | |
| 10 | C1.2 | 2021/12/17 | 04:01 | 04:08 | 04:12 |
Latest news
Tuesday, 17 March 2026
M2.7 solar flare, CME arrival possible
Sunday, 1 February 2026
Complex sunspot region 4366
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Latest forum messages
AR4392 (including CMEs) 112CH 31 HSS 17Growth of Cycle 25 987Incoming & Unnumbered Active Regions 224Current Farside Activity 418
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/03/18 | M2.7 |
| Last geomagnetic storm | 2026/03/14 | Kp6 (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (4%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 82.4 +4.2 |
| Last 30 days | 62.7 -52.5 |