Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1823 | S07 | E55 | 01 | 0130 | Alpha | Aug 22, 2013 | Aug 29, 2013 | Sep 12, 2013 |
| № 1822 | S08 | E42 | 03 | 0020 | Beta | Aug 21, 2013 | Aug 28, 2013 | Sep 11, 2013 |
| № 1820 | S13 | E23 | 07 | 0020 | Beta | Aug 20, 2013 | Aug 27, 2013 | Sep 9, 2013 |
| № 1819 | S16 | W34 | 04 | 0010 | Beta | Aug 16, 2013 | Aug 22, 2013 | Sep 5, 2013 |
| № 1818 | S07 | W21 | 16 | 0330 | Beta-Gamma-Delta | Aug 17, 2013 | Aug 23, 2013 | Sep 6, 2013 |
| № 1817 | S21 | W46 | 13 | 0140 | Beta-Gamma-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.
