Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 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) | |
|---|---|---|---|---|---|---|---|---|
| № 4235 | N30 | E65 | 03 | 0010 | Beta | Oct 4, 2025 | Oct 11, 2025 | Oct 25, 2025 |
| № 4234 | S23 | E19 | 05 | 0010 | Beta | Sep 30, 2025 | Oct 7, 2025 | Oct 21, 2025 |
| № 4233 | N17 | E62 | 07 | 0010 | Beta | Oct 4, 2025 | Oct 11, 2025 | Oct 24, 2025 |
| № 4232 | N03 | E64 | 01 | 0090 | Beta | Oct 4, 2025 | Oct 11, 2025 | Oct 24, 2025 |
| № 4231 | S07 | W81 | 01 | 0030 | Alpha | Sep 23, 2025 | Sep 30, 2025 | Oct 13, 2025 |
| № 4230 | S11 | E02 | 12 | 0090 | Beta | Sep 29, 2025 | Oct 6, 2025 | Oct 20, 2025 |
| № 4229 | S04 | W89 | 02 | 0030 | Beta | Sep 22, 2025 | Sep 29, 2025 | Oct 13, 2025 |
| № 4228 | N04 | W12 | 02 | 0010 | Alpha | Sep 28, 2025 | Oct 5, 2025 | Oct 18, 2025 |
| № 4227 | S17 | W27 | 08 | 0030 | Beta | Sep 27, 2025 | Oct 4, 2025 | Oct 17, 2025 |
| № 4226 | S10 | W21 | 08 | 0090 | Beta | Sep 27, 2025 | Oct 4, 2025 | Oct 18, 2025 |
| № 4225 | N10 | W66 | 01 | 0110 | Alpha | Sep 24, 2025 | Oct 1, 2025 | Oct 14, 2025 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1996 to September 2025. The gray background is the average SSN index.
