Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 15, 2013. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 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
The average monthly sunspot number (SSN) from January 1984 to September 2013. The gray background is the average SSN index.
