Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2408 | S12 | W75 | 01 | 0000 | Alpha | Aug 27, 2015 | Sep 3, 2015 | Sep 17, 2015 |
| № 2407 | N15 | W60 | 05 | 0020 | Beta | Aug 28, 2015 | Sep 4, 2015 | Sep 18, 2015 |
| № 2406 | N03 | E11 | 03 | 0020 | Beta | Sep 3, 2015 | Sep 9, 2015 | Sep 23, 2015 |
| № 2405 | S21 | W01 | 01 | 0000 | Alpha | Sep 2, 2015 | Sep 9, 2015 | Sep 22, 2015 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1986 to September 2015. The gray background is the average SSN index.
