Sunspot region AR8457
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/02/09 | 1 | 70 | HSX | N18E73 | |
| 1999/02/10 | 3 | 90 | CSO | N18E61 | |
| 1999/02/11 | 8 | 200 | DAO | N17E48 | |
| 1999/02/12 | 16 | 290 | EAO | N16E36 | |
| 1999/02/13 | 26 | 350 | EAI | N15E23 | |
| 1999/02/14 | 36 | 660 | EKI | N15E10 | |
| 1999/02/15 | 32 | 660 | EKI | N15W03 | |
| 1999/02/16 | 20 | 600 | EKI | N15W18 | |
| 1999/02/17 | 24 | 550 | EKI | N14W30 | |
| 1999/02/18 | 9 | 330 | EKO | N15W42 | |
| 1999/02/19 | 8 | 260 | EAO | N15W55 | |
| 1999/02/20 | 8 | 190 | EAO | N15W69 | |
| 1999/02/21 | 5 | 110 | CAO | N15W82 |
| C | M |
|---|---|
| 5 | 2 |
The top 7 solar flares from sunspot region 8457
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.44 | 1999/02/14 | 09:59 | 10:45 | 11:10 | |
| 2 | M1.09 | 1999/02/12 | 13:40 | 14:07 | 14:22 | |
| 3 | C6.03 | 1999/02/15 | 19:00 | 19:04 | 19:06 | |
| 4 | C4.59 | 1999/02/12 | 18:59 | 19:14 | 19:24 | |
| 5 | C3.7 | 1999/02/12 | 18:15 | 18:24 | 18:38 | |
| 6 | C2.44 | 1999/02/15 | 13:14 | 13:17 | 13:19 | |
| 7 | C1.94 | 1999/02/15 | 04:44 | 04:46 | 04:47 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/04 | M1.0 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 118.8 +32.8 |
| Last 30 days | 102.1 +47 |
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