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) | |
|---|---|---|---|---|---|---|---|---|
| № 2867 | S18 | W72 | 01 | 0010 | Alpha | Aug 31, 2021 | Sep 7, 2021 | Sep 21, 2021 |
| № 2866 | S18 | E65 | 02 | 0040 | Beta | Sep 11, 2021 | Sep 18, 2021 | Oct 1, 2021 |
| № 2865 | N22 | E27 | 03 | 0010 | Beta | Sep 8, 2021 | Sep 15, 2021 | Sep 29, 2021 |
| № 2864 | N24 | E12 | 07 | 0050 | Beta | Sep 7, 2021 | Sep 14, 2021 | Sep 28, 2021 |
| № 2863 | S16 | E04 | 05 | 0090 | Beta | Sep 6, 2021 | Sep 13, 2021 | Sep 27, 2021 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1992, January to 2021, September. Gray background - average solar cycle.
