Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 16, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2814 | S22 | W29 | 12 | 0050 | Beta | Apr 15, 2021 | Apr 22, 2021 | May 5, 2021 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1992 to April 2021. The gray background is the average SSN index.
