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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 21, 2010. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1100 | S27 | E01 | 01 | 0000 | Alpha | Aug 22, 2010 | Aug 29, 2010 | Sep 12, 2010 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1981 to August 2010. The gray background is the average SSN index.
