Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 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) | |
|---|---|---|---|---|---|---|---|---|
| № 4225 | N10 | E79 | 01 | 0050 | Alpha | Sep 24, 2025 | Oct 1, 2025 | Oct 14, 2025 |
| № 4224 | S09 | E42 | 04 | 0010 | Beta | Sep 21, 2025 | Sep 28, 2025 | Oct 12, 2025 |
| № 4223 | S17 | E61 | 03 | 0020 | Beta | Sep 23, 2025 | Sep 30, 2025 | Oct 13, 2025 |
| № 4222 | N13 | E20 | 03 | 0010 | Alpha | Sep 20, 2025 | Sep 26, 2025 | Oct 10, 2025 |
| № 4221 | N04 | E42 | 03 | 0050 | Beta | Sep 21, 2025 | Sep 28, 2025 | Oct 12, 2025 |
| № 4220 | S18 | E12 | 07 | 0020 | Beta | Sep 19, 2025 | Sep 26, 2025 | Oct 10, 2025 |
| № 4219 | N26 | W32 | 03 | 0010 | Beta | Sep 16, 2025 | Sep 23, 2025 | Oct 7, 2025 |
| № 4217 | S16 | E45 | 08 | 0180 | Beta | Sep 22, 2025 | Sep 28, 2025 | Oct 12, 2025 |
| № 4216 | N10 | E07 | 08 | 0190 | Beta | Sep 19, 2025 | Sep 25, 2025 | Oct 9, 2025 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1996 to September 2025. The gray background is the average SSN index.
