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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1135 | N19 | E02 | 01 | 0000 | Alpha | Dec 19, 2010 | Dec 26, 2010 | Jan 9, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1981 to December 2010. The gray background is the average SSN index.
