Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1824 | S14 | W12 | 06 | 0040 | Beta | Aug 18, 2013 | Aug 25, 2013 | Sep 7, 2013 |
| № 1823 | S07 | E44 | 01 | 0120 | Alpha | Aug 22, 2013 | Aug 29, 2013 | Sep 12, 2013 |
| № 1822 | S08 | E31 | 03 | 0010 | Beta | Aug 21, 2013 | Aug 28, 2013 | Sep 11, 2013 |
| № 1820 | S13 | E11 | 05 | 0010 | Beta | Aug 20, 2013 | Aug 27, 2013 | Sep 9, 2013 |
| № 1818 | S07 | W32 | 13 | 0300 | Beta-Gamma-Delta | Aug 17, 2013 | Aug 23, 2013 | Sep 6, 2013 |
| № 1817 | S21 | W56 | 08 | 0150 | Beta-Delta | Aug 15, 2013 | Aug 22, 2013 | Sep 4, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to August 2013. The gray background is the average SSN index.
