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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1812 | S12 | W75 | 01 | 0010 | Alpha | Jul 30, 2013 | Aug 6, 2013 | Aug 20, 2013 |
| № 1811 | N07 | E01 | 01 | 0010 | Alpha | Aug 5, 2013 | Aug 12, 2013 | Aug 25, 2013 |
| № 1810 | S25 | E34 | 01 | 0040 | Alpha | Aug 7, 2013 | Aug 14, 2013 | Aug 28, 2013 |
| № 1809 | N13 | E29 | 13 | 0110 | Beta | Aug 7, 2013 | Aug 14, 2013 | Aug 27, 2013 |
| № 1808 | N14 | W10 | 06 | 0060 | Beta | Aug 4, 2013 | Aug 11, 2013 | Aug 25, 2013 |
| № 1806 | S14 | W30 | 11 | 0100 | Beta | Aug 3, 2013 | Aug 9, 2013 | Aug 23, 2013 |
| № 1801 | N19 | W74 | 01 | 0060 | Alpha | Jul 30, 2013 | Aug 6, 2013 | Aug 20, 2013 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1984 to August 2013. The gray background is the average SSN index.
