Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 13, 2021. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2905 | S11 | E46 | 02 | 0030 | Beta | Dec 17, 2021 | Dec 24, 2021 | Jan 7, 2022 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1992 to December 2021. The gray background is the average SSN index.
