Sunspots and active regions — August 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2857 | N17 | W25 | 04 | 0030 | Beta | Aug 16, 2021 | Aug 23, 2021 | Sep 5, 2021 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1992, January to 2021, August. Gray background - average solar cycle.
