Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1836 | N11 | E30 | 05 | 0180 | Beta | Sep 3, 2013 | Sep 10, 2013 | Sep 24, 2013 |
| № 1835 | S10 | W03 | 10 | 0180 | Beta | Sep 1, 2013 | Sep 8, 2013 | Sep 21, 2013 |
| № 1834 | N13 | W10 | 17 | 0030 | Beta | Aug 31, 2013 | Sep 7, 2013 | Sep 21, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to August 2013. The gray background is the average SSN index.
