Sunspots and active regions — April 18, 2021
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) | |
|---|---|---|---|---|---|---|---|---|
| № 2816 | S24 | E48 | 04 | 0020 | Beta | Apr 23, 2021 | Apr 30, 2021 | May 13, 2021 |
| № 2814 | S22 | W57 | 04 | 0010 | Beta | Apr 14, 2021 | Apr 21, 2021 | May 5, 2021 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1992, January to 2021, April. Gray background - average solar cycle.
