Active areas
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) | |
|---|---|---|---|---|---|---|---|---|
| № 2821 | S21 | W72 | 01 | 0020 | Alpha | Apr 25, 2021 | May 2, 2021 | May 16, 2021 |
| № 2820 | S22 | W55 | 05 | 0030 | Beta | Apr 27, 2021 | May 4, 2021 | May 17, 2021 |
| № 2818 | S16 | W51 | 01 | 0020 | Alpha | Apr 27, 2021 | May 4, 2021 | May 17, 2021 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1992, January to 2021, April. Gray background - average solar cycle.
