Sunspot region AR12817
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2021/04/19 | 8 | 60 | BXO | N18W45 | |
| 2021/04/20 | 13 | 140 | DAI | N18W60 | |
| 2021/04/21 | 7 | 180 | DAO | N18W76 | |
| 2021/04/22 | 5 | 140 | CSO | N18W92 | |
| 2021/04/23 | 5 | 140 | CSO | N18W0* |
2021/04/19
2021/04/20
2021/04/21
2021/04/22
2021/04/23
|
2021/04/19
2021/04/20
2021/04/21
2021/04/22
2021/04/23
|
| B | C |
|---|---|
| 48 | 12 |
The top 10 solar flares from sunspot region 12817
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C8.6 | 2021/04/22 | 20:00 | 20:11 | 20:20 | |
| 2 | C4.3 | 2021/04/22 | 09:14 | 09:21 | 09:41 | |
| 3 | C3.7 | 2021/04/22 | 10:40 | 10:49 | 11:03 | |
| 4 | C2.4 | 2021/04/23 | 23:08 | 23:12 | 23:16 | |
| 5 | C2.3 | 2021/04/22 | 07:16 | 07:23 | 07:27 | |
| 6 | C2.3 | 2021/04/23 | 22:39 | 22:54 | 22:57 | |
| 7 | C2.3 | 2021/04/23 | 22:57 | 23:01 | 23:06 | |
| 8 | C1.7 | 2021/04/22 | 05:50 | 05:57 | 06:02 | |
| 9 | C1.6 | 2021/04/21 | 01:18 | 01:29 | 02:37 | |
| 10 | C1.4 | 2021/04/22 | 10:03 | 10:08 | 10:14 |
Latest news
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Sunday, 18 January 2026
X1.9 solar flare with earth-directed CME
Wednesday, 31 December 2025
Happy New Year! Celebrate with an M7.1 solar flare!
Latest forum messages
Do the high-resolution sunspot counts point to more complex sunspots? 34CH 17 6Broad-spectrum aurora pillars 21Current Farside Activity 349Unspecified geomagnetic activity 63
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!
Space weather facts
| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| 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 |
| January 2026 | 119.3 -4.7 |
| Last 30 days | 120.3 +3.4 |