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) | |
|---|---|---|---|---|---|---|---|---|
| № 2875 | S32 | W34 | 03 | 0010 | Beta | Sep 21, 2021 | Sep 28, 2021 | Oct 13, 2021 |
| № 2874 | S25 | W26 | 02 | 0010 | Alpha | Sep 22, 2021 | Sep 29, 2021 | Oct 13, 2021 |
| № 2873 | N24 | W35 | 05 | 0080 | Beta | Sep 21, 2021 | Sep 28, 2021 | Oct 12, 2021 |
| № 2872 | N17 | E15 | 09 | 0070 | Beta | Sep 25, 2021 | Oct 2, 2021 | Oct 16, 2021 |
| № 2871 | S28 | E25 | 07 | 0250 | Beta-Delta | 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.
