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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1108 | S30 | E20 | 11 | 0380 | Beta | Sep 24, 2010 | Oct 1, 2010 | Oct 15, 2010 |
| № 1106 | S21 | W57 | 07 | 0020 | Beta | Sep 18, 2010 | Sep 25, 2010 | Oct 9, 2010 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1981 to September 2010. The gray background is the average SSN index.
