Sunspot region AR8644
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/07/24 | 1 | 30 | HAX | S24E68 | |
| 1999/07/25 | 2 | 40 | CAO | S25E54 | |
| 1999/07/26 | 1 | 40 | HSX | S25E42 | |
| 1999/07/27 | 1 | 40 | HSX | S25E28 | |
| 1999/07/28 | 1 | 30 | HSX | S25E16 | |
| 1999/07/29 | 1 | 40 | HSX | S26E02 | |
| 1999/07/30 | 3 | 30 | CSO | S26W08 | |
| 1999/07/31 | 2 | 20 | CRO | S25W23 | |
| 1999/08/01 | 2 | 10 | AXX | S25W36 |
| M |
|---|
| 1 |
The top 1 solar flares from sunspot region 8644
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.79 | 1999/07/23 | 22:55 | 23:00 | 23:06 |
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| Last X-flare | 2026/03/30 | X1.4 |
| 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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| March 2026 | 86.6 +8.4 |
| Last 30 days | 86.6 +11.2 |
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