Sunspot region AR8431
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/01/05 | 1 | 10 | AXX | S28E69 | |
| 1999/01/06 | 1 | 30 | HSX | S28E56 | |
| 1999/01/07 | 3 | 30 | CRO | S28E43 | |
| 1999/01/08 | 4 | 30 | BXO | S28E31 | |
| 1999/01/09 | 7 | 10 | BXO | S28E19 | |
| 1999/01/10 | 6 | 40 | DSO | S28E06 | |
| 1999/01/11 | 5 | 40 | CAO | S28W07 | |
| 1999/01/12 | 2 | 10 | AXX | S28W19 | |
| 1999/01/13 | 1 | 20 | HAX | S27W32 |
| C |
|---|
| 4 |
The top 4 solar flares from sunspot region 8431
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C5.31 | 1999/01/08 | 09:51 | 10:22 | 11:10 | |
| 2 | C2 | 1999/01/06 | 13:34 | 13:41 | 13:52 | |
| 3 | C1.76 | 1999/01/06 | 13:09 | 13:31 | 13:33 | |
| 4 | C1.46 | 1999/01/10 | 02:41 | 02:59 | 03:08 |
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| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
|---|---|
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