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 | W31 | 01 | 0010 | Alpha | Sep 28, 2021 | Oct 5, 2021 | Oct 19, 2021 |
| № 2880 | N29 | E45 | 18 | 0390 | Beta-Gamma | Oct 4, 2021 | Oct 11, 2021 | Oct 26, 2021 |
| № 2877 | S16 | W38 | 14 | 0130 | Beta-Gamma | Sep 28, 2021 | Oct 5, 2021 | Oct 18, 2021 |
| № 2871 | S28 | W63 | 01 | 0010 | 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.
