Sunspot region AR8487
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/03/12 | 3 | 20 | BXO | N17E63 | |
| 1999/03/13 | 8 | 90 | CAO | N17E51 | |
| 1999/03/14 | 16 | 100 | DAO | N17E39 | |
| 1999/03/15 | 20 | 190 | ESI | N16E25 | |
| 1999/03/16 | 18 | 200 | EAI | N16E11 | |
| 1999/03/17 | 22 | 180 | ESI | N17W01 | |
| 1999/03/18 | 21 | 180 | ESI | N17W15 | |
| 1999/03/19 | 17 | 150 | CSO | N17W25 | |
| 1999/03/20 | 2 | 160 | HAX | N16W45 | |
| 1999/03/21 | 3 | 100 | HSX | N17W59 | |
| 1999/03/22 | 2 | 90 | CSO | N17W72 | |
| 1999/03/23 | 2 | 30 | BXO | N16W86 |
| C | M |
|---|---|
| 12 | 4 |
The top 10 solar flares from sunspot region 8487
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M2.83 | 1999/03/13 | 20:22 | 20:34 | 20:39 | |
| 2 | M1.7 | 1999/03/14 | 09:08 | 10:10 | 10:25 | |
| 3 | M1.35 | 1999/03/12 | 17:20 | 17:26 | 17:32 | |
| 4 | M1.07 | 1999/03/14 | 13:38 | 13:50 | 14:11 | |
| 5 | C8.84 | 1999/03/11 | 20:30 | 20:34 | 20:36 | |
| 6 | C7.21 | 1999/03/11 | 08:21 | 08:25 | 08:27 | |
| 7 | C4.61 | 1999/03/12 | 20:33 | 20:38 | 20:40 | |
| 8 | C3.91 | 1999/03/13 | 05:06 | 05:16 | 05:30 | |
| 9 | C3.34 | 1999/03/12 | 06:46 | 06:51 | 06:53 | |
| 10 | C2.96 | 1999/03/11 | 11:54 | 11:57 | 11:59 |
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| Last M-flare | 2025/12/31 | M7.11 |
| Last geomagnetic storm | 2026/01/02 | Kp5 (G1) |
| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
|---|---|
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| January 2026 | 106.7 -17.3 |
| Last 30 days | 102.5 -7.3 |