Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 7, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1838 | S05 | E57 | 01 | 0020 | Alpha | Sep 12, 2013 | Sep 19, 2013 | Oct 2, 2013 |
| № 1837 | S16 | W71 | 05 | 0110 | Beta | Sep 2, 2013 | Sep 9, 2013 | Sep 23, 2013 |
| № 1836 | N11 | W65 | 05 | 0130 | Beta | Sep 3, 2013 | Sep 10, 2013 | Sep 23, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to September 2013. The gray background is the average SSN index.
