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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1850 | N09 | E64 | 06 | 0090 | Beta | Sep 27, 2013 | Oct 3, 2013 | Oct 17, 2013 |
| № 1849 | N22 | E20 | 07 | 0010 | Beta | Sep 23, 2013 | Sep 30, 2013 | Oct 14, 2013 |
| № 1848 | S11 | E25 | 01 | 0000 | Alpha | Sep 24, 2013 | Oct 1, 2013 | Oct 14, 2013 |
| № 1846 | S17 | E38 | 04 | 0160 | Beta | Sep 25, 2013 | Oct 2, 2013 | Oct 15, 2013 |
| № 1843 | N02 | W33 | 08 | 0050 | Beta | Sep 19, 2013 | Sep 26, 2013 | Oct 10, 2013 |
| № 1841 | S04 | W50 | 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.
