Sunspots and active regions — December 21, 2020
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 2794 | S17 | E78 | 01 | 0120 | Alpha | Dec 28, 2020 | Jan 4, 2021 | Jan 17, 2021 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1991, January to 2020, December. Gray background - average solar cycle.
