Sunspot region AR8504
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/03/31 | 3 | 140 | HSX | S28E61 | |
| 1999/04/01 | 4 | 90 | CAO | S28E47 | |
| 1999/04/02 | 4 | 110 | CAO | S28E36 | |
| 1999/04/03 | 7 | 70 | CSO | S28E23 | |
| 1999/04/04 | 10 | 70 | DSO | S28E11 | |
| 1999/04/05 | 10 | 50 | DSO | S28W02 | |
| 1999/04/06 | 11 | 50 | DSO | S28W15 | |
| 1999/04/07 | 6 | 20 | BXO | S28W27 | |
| 1999/04/08 | 4 | 10 | BXO | S27W40 |
Latest news
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Sunday, 18 January 2026
X1.9 solar flare with earth-directed CME
Wednesday, 31 December 2025
Happy New Year! Celebrate with an M7.1 solar flare!
Latest forum messages
CH 17 5Do the high-resolution sunspot counts point to more complex sunspots? 31Broad-spectrum aurora pillars 20Current Farside Activity 349Unspecified geomagnetic activity 63
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Space weather facts
| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| January 2026 | 119.3 -4.7 |
| Last 30 days | 120.3 +3.4 |