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) | |
|---|---|---|---|---|---|---|---|---|
| № 2881 | N16 | W19 | 01 | 0010 | Alpha | Sep 28, 2021 | Oct 5, 2021 | Oct 19, 2021 |
| № 2880 | N30 | E55 | 05 | 0010 | Beta | Oct 4, 2021 | Oct 11, 2021 | Oct 26, 2021 |
| № 2877 | S18 | W26 | 10 | 0030 | Beta | Sep 28, 2021 | Oct 5, 2021 | Oct 19, 2021 |
| № 2871 | S28 | W52 | 01 | 0030 | Alpha | Sep 26, 2021 | Oct 3, 2021 | Oct 17, 2021 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1992, January to 2021, September. Gray background - average solar cycle.
