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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1851 | S16 | E71 | 01 | 0030 | Alpha | Sep 29, 2013 | Oct 6, 2013 | Oct 20, 2013 |
| № 1850 | N07 | E40 | 05 | 0050 | Beta | Sep 27, 2013 | Oct 4, 2013 | Oct 17, 2013 |
| № 1849 | N19 | W08 | 12 | 0090 | Beta | Sep 23, 2013 | Sep 30, 2013 | Oct 14, 2013 |
| № 1846 | S18 | E12 | 01 | 0140 | Alpha | Sep 25, 2013 | Oct 2, 2013 | Oct 15, 2013 |
| № 1845 | S17 | W03 | 03 | 0010 | Beta | Sep 24, 2013 | Sep 30, 2013 | Oct 14, 2013 |
| № 1843 | N03 | W60 | 05 | 0020 | Beta | Sep 19, 2013 | Sep 26, 2013 | Oct 10, 2013 |
| № 1841 | S04 | W76 | 01 | 0010 | Alpha | Sep 18, 2013 | Sep 25, 2013 | Oct 8, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to September 2013. The gray background is the average SSN index.
