Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 4204 | N03 | E59 | 01 | 0010 | Alpha | Sep 2, 2025 | Sep 9, 2025 | Sep 23, 2025 |
| № 4203 | N12 | W73 | 07 | 0060 | Beta | Aug 23, 2025 | Aug 30, 2025 | Sep 13, 2025 |
| № 4202 | S15 | E50 | 02 | 0150 | Alpha | Sep 2, 2025 | Sep 8, 2025 | Sep 22, 2025 |
| № 4201 | S21 | E46 | 07 | 0100 | Beta | Sep 1, 2025 | Sep 8, 2025 | Sep 22, 2025 |
| № 4200 | S08 | W12 | 11 | 0040 | Beta | Aug 28, 2025 | Sep 4, 2025 | Sep 17, 2025 |
| № 4199 | N04 | E47 | 09 | 0170 | Beta | Sep 1, 2025 | Sep 8, 2025 | Sep 22, 2025 |
| № 4198 | N11 | E09 | 02 | 0010 | Beta | Aug 30, 2025 | Sep 5, 2025 | Sep 19, 2025 |
| № 4197 | S17 | E32 | 29 | 0720 | Beta-Gamma | Aug 31, 2025 | Sep 7, 2025 | Sep 21, 2025 |
| № 4196 | S12 | E27 | 01 | 0010 | Alpha | Aug 31, 2025 | Sep 7, 2025 | Sep 20, 2025 |
| № 4195 | S18 | E16 | 01 | 0010 | Alpha | Aug 30, 2025 | Sep 6, 2025 | Sep 20, 2025 |
| № 4194 | N03 | W27 | 02 | 0010 | Alpha | Aug 27, 2025 | Sep 3, 2025 | Sep 16, 2025 |
| № 4191 | N12 | W11 | 13 | 0400 | Beta | Aug 28, 2025 | Sep 4, 2025 | Sep 17, 2025 |
| № 4190 | N19 | W40 | 01 | 0010 | Alpha | Aug 26, 2025 | Sep 2, 2025 | Sep 15, 2025 |
| № 4188 | S09 | W48 | 01 | 0030 | Alpha | Aug 25, 2025 | Sep 1, 2025 | Sep 15, 2025 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1996 to August 2025. The gray background is the average SSN index.
