Sunspot region AR8557
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/05/28 | 5 | 90 | DSO | S28E73 | |
| 1999/05/29 | 4 | 30 | DRO | S29E56 | |
| 1999/05/30 | 7 | 130 | CAO | S30E46 | |
| 1999/05/31 | 5 | 70 | DAO | S30E34 | |
| 1999/06/01 | 5 | 30 | HAX | S30E21 | |
| 1999/06/02 | 9 | 20 | CRO | S29E08 | |
| 1999/06/03 | 4 | 10 | BXO | S27W06 |
| C |
|---|
| 3 |
The top 3 solar flares from sunspot region 8557
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C8.91 | 1999/05/27 | 15:15 | 15:35 | 16:03 | |
| 2 | C3.14 | 1999/05/28 | 11:30 | 12:13 | 12:42 | |
| 3 | C1.86 | 1999/06/01 | 12:31 | 12:34 | 12:37 |
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/03/28 | M1.3 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
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| April 2026 | 130 +51.8 |
| Last 30 days | 91.6 +20.3 |
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