Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2797 | S18 | E78 | 02 | 0090 | Alpha | Jan 25, 2021 | Feb 1, 2021 | Feb 14, 2021 |
| № 2796 | S21 | W30 | 01 | 0010 | Alpha | Jan 17, 2021 | Jan 23, 2021 | Feb 6, 2021 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1992 to January 2021. The gray background is the average SSN index.
