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 |
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Space weather facts
| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/08 | M1.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 162.7 +70.9 |
| Last 30 days | 108 +13.3 |