Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 21, 2016. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2620 | S23 | W37 | 04 | 0010 | Beta | Dec 19, 2016 | Dec 26, 2016 | Jan 9, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1987 to December 2016. The gray background is the average SSN index.
