Sunspots and active regions — July 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2847 | S28 | W13 | 01 | 0000 | Alpha | Jul 28, 2021 | Aug 4, 2021 | Aug 18, 2021 |
| № 2846 | N24 | W32 | 04 | 0000 | Beta | Jul 26, 2021 | Aug 2, 2021 | Aug 16, 2021 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1992, January to 2021, July. Gray background - average solar cycle.
