Sunspot region AR13421
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2023/09/03 | 5 | 20 | BXO | N15E14 | |
| 2023/09/04 | 9 | 20 | DAI | N15W00 | |
| 2023/09/05 | 15 | 140 | DAI | N14W13 | |
| 2023/09/06 | 19 | 220 | DAI | N15W27 | |
| 2023/09/07 | 23 | 220 | EAI | N15W40 | |
| 2023/09/08 | 17 | 170 | EAI | N14W53 | |
| 2023/09/09 | 12 | 100 | EAI | N14W66 | |
| 2023/09/10 | 11 | 60 | EAO | N11W78 | |
| 2023/09/11 | 4 | 10 | BXO | N15W94 | |
| 2023/09/12 | 4 | 10 | BXO | N15W0* |
2023/09/03
2023/09/04
2023/09/05
2023/09/06
2023/09/07
2023/09/08
2023/09/09
2023/09/10
2023/09/11
2023/09/12
|
2023/09/03
2023/09/04
2023/09/05
2023/09/06
2023/09/07
2023/09/08
2023/09/09
2023/09/10
2023/09/11
2023/09/12
|
| C | M |
|---|---|
| 25 | 3 |
The top 10 solar flares from sunspot region 13421
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M2.0 | 2023/09/05 | 08:03 | 08:12 | 08:24 | |
| 2 | M1.2 | 2023/09/05 | 19:32 | 19:45 | 19:57 | |
| 3 | M1.0 | 2023/09/05 | 23:21 | 23:39 | 23:53 | |
| 4 | C8.4 | 2023/09/09 | 01:15 | 01:20 | 01:24 | |
| 5 | C5.7 | 2023/09/09 | 03:12 | 03:24 | 03:28 | |
| 6 | C5.3 | 2023/09/06 | 17:51 | 17:56 | 18:00 | |
| 7 | C4.7 | 2023/09/06 | 00:42 | 00:50 | 01:01 | |
| 8 | C4.2 | 2023/09/08 | 23:07 | 23:13 | 23:17 | |
| 9 | C4.2 | 2023/09/05 | 04:36 | 04:47 | 04:59 | |
| 10 | C3.8 | 2023/09/06 | 07:50 | 07:56 | 08:00 |
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/02/25 | M2.4 |
| Last geomagnetic storm | 2026/03/03 | Kp5 (G1) |
| 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 | 78.5 +0.3 |
| Last 30 days | 54.2 -74.7 |