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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 17, 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 | S28 | E71 | 05 | 0290 | Beta | Sep 23, 2010 | Sep 30, 2010 | Oct 14, 2010 |
| № 1106 | S20 | E07 | 21 | 0110 | 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.
