Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 17, 2020. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2793 | S15 | E35 | 02 | 0030 | Beta | Dec 21, 2020 | Dec 27, 2020 | Jan 10, 2021 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1991 to December 2020. The gray background is the average SSN index.
