Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2869 | S34 | W42 | 01 | 0010 | Alpha | Sep 11, 2021 | Sep 18, 2021 | Oct 2, 2021 |
| № 2868 | S20 | W62 | 06 | 0200 | Beta | Sep 9, 2021 | Sep 16, 2021 | Sep 30, 2021 |
| № 2866 | S19 | W46 | 10 | 0180 | Beta | Sep 10, 2021 | Sep 17, 2021 | Oct 1, 2021 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1992 to September 2021. The gray background is the average SSN index.
