Sunspots and active regions — July 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2844 | S43 | E60 | 01 | 0020 | Alpha | Jul 23, 2021 | Jul 30, 2021 | Aug 15, 2021 |
| № 2843 | S17 | W70 | 03 | 0030 | Beta | Jul 13, 2021 | Jul 19, 2021 | Aug 2, 2021 |
| № 2842 | N25 | E02 | 01 | 0020 | Alpha | Jul 18, 2021 | Jul 25, 2021 | Aug 8, 2021 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1992, January to 2021, July. Gray background - average solar cycle.
