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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 13, 2011. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1375 | N08 | E11 | 04 | 0070 | Beta | Dec 15, 2011 | Dec 22, 2011 | Jan 4, 2012 |
| № 1374 | S17 | E15 | 06 | 0150 | Beta-Delta | Dec 15, 2011 | Dec 22, 2011 | Jan 5, 2012 |
| № 1372 | N10 | W36 | 06 | 0010 | Beta | Dec 11, 2011 | Dec 18, 2011 | Jan 1, 2012 |
| № 1366 | N18 | W55 | 01 | 0050 | Alpha | Dec 10, 2011 | Dec 17, 2011 | Dec 30, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to December 2011. The gray background is the average SSN index.
