Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 15, 2015. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2418 | S15 | E58 | 01 | 0200 | Alpha | Sep 20, 2015 | Sep 27, 2015 | Oct 11, 2015 |
| № 2415 | S22 | E30 | 16 | 0150 | Beta-Gamma | Sep 18, 2015 | Sep 25, 2015 | Oct 9, 2015 |
| № 2414 | S10 | W59 | 05 | 0170 | Beta | Sep 11, 2015 | Sep 18, 2015 | Oct 2, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to September 2015. The gray background is the average SSN index.
