Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 17, 2026. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 4528 | S11 | W81 | 01 | 0120 | Alpha | Sep 12, 2026 | Sep 19, 2026 | Oct 2, 2026 |
| № 4527 | N03 | W98 | 02 | 0130 | Alpha | Sep 10, 2026 | Sep 17, 2026 | Oct 1, 2026 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1997 to September 2026. The gray background is the average SSN index.
