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) | |
|---|---|---|---|---|---|---|---|---|
| № 2870 | S31 | E58 | 01 | 0010 | Alpha | Sep 15, 2021 | Sep 23, 2021 | Oct 7, 2021 |
| № 2869 | S34 | E01 | 10 | 0070 | Beta | Sep 11, 2021 | Sep 18, 2021 | Oct 3, 2021 |
| № 2868 | S21 | W17 | 18 | 0260 | Beta | Sep 10, 2021 | Sep 16, 2021 | Sep 30, 2021 |
| № 2866 | S18 | W04 | 29 | 0500 | Beta | Sep 11, 2021 | Sep 17, 2021 | Oct 1, 2021 |
| № 2864 | N24 | W60 | 04 | 0100 | Alpha | Sep 6, 2021 | Sep 13, 2021 | Sep 27, 2021 |
| № 2863 | S16 | W64 | 02 | 0090 | 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.
