Sunspot region AR8506
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/04/04 | 8 | 10 | BXO | S26W02 | |
| 1999/04/05 | 17 | 100 | DAO | S26W15 | |
| 1999/04/06 | 23 | 290 | DAO | S26W28 | |
| 1999/04/07 | 21 | 260 | EAO | S26W42 | |
| 1999/04/08 | 14 | 210 | EAO | S26W55 | |
| 1999/04/09 | 5 | 130 | CAO | S26W68 | |
| 1999/04/10 | 3 | 130 | CAO | S28W82 |
| C |
|---|
| 5 |
The top 5 solar flares from sunspot region 8506
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C4.83 | 1999/04/05 | 23:01 | 23:09 | 23:15 | |
| 2 | C4.49 | 1999/04/03 | 20:44 | 20:50 | 20:58 | |
| 3 | C4.03 | 1999/04/03 | 22:16 | 22:20 | 22:23 | |
| 4 | C2.31 | 1999/04/03 | 20:00 | 20:17 | 20:26 | |
| 5 | C2.04 | 1999/04/03 | 13:39 | 13:44 | 13:47 |
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| Last M-flare | 2025/12/09 | M1.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
|---|---|
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