Sunspot region AR12821
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2021/04/25 | 3 | 30 | CRO | S22W16 | |
| 2021/04/26 | 8 | 70 | DSI | S22W29 | |
| 2021/04/27 | 5 | 60 | DAI | S22W43 | |
| 2021/04/28 | 5 | 30 | CAO | S23W57 | |
| 2021/04/29 | 1 | 20 | HSX | S21W69 | |
| 2021/04/30 | 1 | 30 | HSX | S21W89 | |
| 2021/05/01 | 1 | 30 | HSX | S21W0* |
2021/04/25
2021/04/26
2021/04/27
2021/04/28
2021/04/29
2021/04/30
2021/05/01
|
2021/04/25
2021/04/26
2021/04/27
2021/04/28
2021/04/29
2021/04/30
2021/05/01
|
| B |
|---|
| 9 |
The top 9 solar flares from sunspot region 12821
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | B6.2 | 2021/04/29 | 22:13 | 22:32 | 22:41 | |
| 2 | B3.3 | 2021/04/27 | 16:04 | 16:13 | 16:17 | |
| 3 | B2.7 | 2021/04/27 | 08:13 | 08:23 | 08:36 | |
| 4 | B2.4 | 2021/04/29 | 20:34 | 20:54 | 21:03 | |
| 5 | B1.4 | 2021/04/29 | 17:59 | 18:05 | 18:17 | |
| 6 | B1.3 | 2021/04/29 | 18:19 | 18:23 | 18:29 | |
| 7 | B1.2 | 2021/04/27 | 04:27 | 04:34 | 04:39 | |
| 8 | B1.2 | 2021/04/28 | 12:40 | 12:44 | 12:48 | |
| 9 | B1.1 | 2021/04/27 | 07:37 | 07:43 | 07:57 |
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Space weather facts
| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/08 | M2.0 |
| 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 |