Sunspot region AR8420
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1998/12/24 | 1 | 10 | AXX | N18E64 | |
| 1998/12/25 | 2 | 10 | AXX | N18E52 | |
| 1998/12/26 | 1 | 0 | AXX | N17E40 | |
| 1998/12/27 | 3 | 10 | BXO | N20E24 | |
| 1998/12/28 | 3 | 10 | BXO | N20E12 | |
| 1998/12/29 | 3 | 10 | BXO | N18W01 | |
| 1998/12/31 | 2 | 10 | HRX | N19W17 | |
| 1999/01/01 | 2 | 0 | AXX | N20W30 | |
| 1999/01/02 | 5 | 30 | BXO | N20W42 | |
| 1999/01/03 | 1 | 0 | AXX | N20W55 |
| C | M |
|---|---|
| 1 | 1 |
The top 2 solar flares from sunspot region 8420
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.26 | 1999/01/03 | 08:07 | 08:54 | 09:58 | |
| 2 | C1.47 | 1999/01/03 | 05:23 | 05:26 | 05:28 |
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Saturday, 14 September 2024
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Thursday, 12 September 2024
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Severe G4 geomagnetic storm
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| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
|---|---|
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