Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 21, 2005. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 837 | S11 | W20 | 21 | 0210 | Beta | Dec 20, 2005 | Dec 27, 2005 | Jan 10, 2006 |
| № 835 | N18 | W67 | 01 | 0110 | Alpha | Dec 17, 2005 | Dec 24, 2005 | Jan 6, 2006 |
| № 834 | S07 | W71 | 01 | 0050 | Alpha | Dec 17, 2005 | Dec 23, 2005 | Jan 6, 2006 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1976 to December 2005. The gray background is the average SSN index.
