Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 21, 2021. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 2873 | N26 | W05 | 08 | 0010 | Beta | Sep 21, 2021 | Sep 28, 2021 | Oct 12, 2021 |
| № 2872 | N17 | E44 | 07 | 0030 | Beta | Sep 25, 2021 | Oct 2, 2021 | Oct 16, 2021 |
| № 2871 | S29 | E52 | 06 | 0240 | Beta | Sep 26, 2021 | Oct 3, 2021 | Oct 17, 2021 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1992 to September 2021. The gray background is the average SSN index.
