Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2882 | N14 | E79 | 01 | 0180 | Alpha | Oct 11, 2021 | Oct 18, 2021 | Oct 31, 2021 |
| № 2880 | N31 | W05 | 06 | 0230 | Beta | Oct 4, 2021 | Oct 12, 2021 | Oct 26, 2021 |
| № 2877 | S21 | W91 | 01 | 0030 | Alpha | Sep 28, 2021 | Oct 5, 2021 | Oct 19, 2021 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1992 to October 2021. The gray background is the average SSN index.
