Sunspot region AR8521
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/04/20 | 3 | 0 | BXO | N34W07 | |
| 1999/04/21 | 1 | 0 | AXX | N32W19 | |
| 1999/04/22 | 4 | 30 | CSO | N34W35 | |
| 1999/04/23 | 8 | 30 | CAO | N34W46 | |
| 1999/04/24 | 4 | 30 | CSO | N34W59 | |
| 1999/04/25 | 1 | 10 | AXX | N33W76 |
| B |
|---|
| 1 |
The top 1 solar flares from sunspot region 8521
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | B8.3 | 1999/04/21 | 11:52 | 11:56 | 12:00 |
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| Last geomagnetic storm | 2024/05/02 | Kp7- (G3) |
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|---|---|
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| Monthly mean Sunspot Number | |
|---|---|
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| Last 30 days | 149.4 +51.8 |