Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 1841 | S06 | E28 | 03 | 0040 | Beta | Sep 18, 2013 | Sep 25, 2013 | Oct 8, 2013 |
| № 1839 | S12 | W83 | 01 | 0020 | Alpha | Sep 10, 2013 | Sep 17, 2013 | Sep 30, 2013 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1984, January to 2013, September. Gray background - average solar cycle.
