Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 18, 2025. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 4186 | N07 | W77 | 02 | 0040 | Beta | Aug 13, 2025 | Aug 20, 2025 | Sep 3, 2025 |
| № 4182 | N08 | E16 | 01 | 0010 | Alpha | Aug 20, 2025 | Aug 27, 2025 | Sep 10, 2025 |
| № 4180 | S03 | W11 | 09 | 0040 | Beta | Aug 18, 2025 | Aug 25, 2025 | Sep 7, 2025 |
| № 4171 | N19 | W78 | 01 | 0010 | Alpha | Aug 13, 2025 | Aug 20, 2025 | Sep 3, 2025 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1996 to August 2025. The gray background is the average SSN index.
