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) | |
|---|---|---|---|---|---|---|---|---|
| № 2868 | S21 | E05 | 10 | 0240 | Beta | Sep 9, 2021 | Sep 16, 2021 | Sep 30, 2021 |
| № 2866 | S18 | E21 | 23 | 0430 | Beta | Sep 11, 2021 | Sep 17, 2021 | Oct 1, 2021 |
| № 2864 | N24 | W31 | 10 | 0220 | Beta | Sep 7, 2021 | Sep 14, 2021 | Sep 27, 2021 |
| № 2863 | S17 | W40 | 02 | 0080 | Alpha | 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.
