Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1828 | N16 | E57 | 06 | 0060 | Beta | Aug 26, 2013 | Sep 2, 2013 | Sep 16, 2013 |
| № 1827 | S18 | E44 | 07 | 0160 | Beta-Gamma | Aug 25, 2013 | Sep 1, 2013 | Sep 15, 2013 |
| № 1825 | N16 | W40 | 12 | 0080 | Beta | Aug 19, 2013 | Aug 26, 2013 | Sep 8, 2013 |
| № 1824 | S12 | W53 | 03 | 0050 | Beta | Aug 18, 2013 | Aug 25, 2013 | Sep 7, 2013 |
| № 1823 | S08 | E03 | 05 | 0120 | Beta | Aug 22, 2013 | Aug 29, 2013 | Sep 12, 2013 |
| № 1820 | S12 | W34 | 10 | 0060 | Beta-Gamma | Aug 19, 2013 | Aug 26, 2013 | Sep 9, 2013 |
| № 1818 | S05 | W76 | 02 | 0210 | Alpha | Aug 16, 2013 | Aug 23, 2013 | Sep 6, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to August 2013. The gray background is the average SSN index.
