Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1853 | N19 | W77 | 01 | 0010 | Alpha | Sep 23, 2013 | Sep 30, 2013 | Oct 14, 2013 |
| № 1852 | S20 | W81 | 02 | 0010 | Beta | Sep 23, 2013 | Sep 30, 2013 | Oct 13, 2013 |
| № 1850 | N09 | W30 | 10 | 0140 | Beta-Gamma | Sep 27, 2013 | Oct 4, 2013 | Oct 17, 2013 |
| № 1846 | S17 | W56 | 01 | 0120 | Alpha | Sep 25, 2013 | Oct 2, 2013 | Oct 15, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to September 2013. The gray background is the average SSN index.
