Sunspot region AR10521
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 2003/12/11 | 2 | 60 | DAO | S11E82 | |
| 2003/12/12 | 3 | 110 | DSO | S11E63 | |
| 2003/12/13 | 4 | 90 | CSO | S12E48 | |
| 2003/12/14 | 4 | 80 | DSO | S12E34 | |
| 2003/12/15 | 4 | 50 | DSO | S12E21 | |
| 2003/12/16 | 3 | 40 | DSO | S12E09 | |
| 2003/12/17 | 6 | 50 | DSO | S11W05 | |
| 2003/12/18 | 5 | 20 | CRO | S11W20 | |
| 2003/12/19 | 3 | 20 | HSX | S12W34 | |
| 2003/12/20 | 2 | 10 | BXO | S12W47 |
| C |
|---|
| 1 |
The top 1 solar flares from sunspot region 10521
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | C1.46 | 2003/12/17 | 13:03 | 13:09 | 13:16 |
Latest news
Monday, 30 March 2026
X1.5 solar flare
Tuesday, 17 March 2026
M2.7 solar flare, CME arrival possible
Sunday, 1 February 2026
Complex sunspot region 4366
Latest forum messages
AR4409 142Late 2026/04/01 Filament CME 87Artemis 2 Live 1Comet C/2026 A1 (MAPS) for the southern hemisphere 40AR4405 239
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/04 | M1.7 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 133.3 +47.4 |
| Last 30 days | 96.1 +32 |
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