Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 17, 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 | N08 | W60 | 06 | 0060 | Beta | Aug 13, 2025 | Aug 20, 2025 | Sep 3, 2025 |
| № 4182 | N08 | E32 | 05 | 0030 | Beta | Aug 20, 2025 | Aug 27, 2025 | Sep 10, 2025 |
| № 4180 | S03 | E04 | 07 | 0020 | Beta | Aug 18, 2025 | Aug 25, 2025 | Sep 7, 2025 |
| № 4179 | S10 | W11 | 08 | 0020 | Beta | Aug 17, 2025 | Aug 24, 2025 | Sep 6, 2025 |
| № 4177 | N05 | W44 | 01 | 0010 | Alpha | Aug 15, 2025 | Aug 21, 2025 | Sep 4, 2025 |
| № 4175 | N12 | W46 | 01 | 0010 | Alpha | Aug 14, 2025 | Aug 21, 2025 | Sep 4, 2025 |
| № 4172 | N08 | W84 | 03 | 0180 | Beta | Aug 12, 2025 | Aug 18, 2025 | Sep 1, 2025 |
| № 4171 | N19 | W64 | 01 | 0030 | Alpha | Aug 13, 2025 | Aug 20, 2025 | Sep 3, 2025 |
| № 4169 | N22 | W82 | 01 | 0030 | Alpha | Aug 12, 2025 | Aug 18, 2025 | Sep 1, 2025 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1996 to August 2025. The gray background is the average SSN index.
