Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 15, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1377 | N12 | E43 | 04 | 0060 | Beta | Dec 19, 2011 | Dec 26, 2011 | Jan 9, 2012 |
| № 1376 | N20 | E39 | 04 | 0010 | Beta | Dec 19, 2011 | Dec 26, 2011 | Jan 9, 2012 |
| № 1375 | N08 | W16 | 02 | 0040 | Alpha | Dec 15, 2011 | Dec 22, 2011 | Jan 4, 2012 |
| № 1374 | S18 | W11 | 04 | 0120 | Beta | Dec 15, 2011 | Dec 22, 2011 | Jan 5, 2012 |
| № 1366 | N18 | W81 | 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.
