Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 12, 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 | S35 | W26 | 03 | 0040 | Beta | Sep 11, 2021 | Sep 18, 2021 | Oct 2, 2021 |
| № 2868 | S19 | W47 | 21 | 0260 | Beta | Sep 9, 2021 | Sep 16, 2021 | Sep 30, 2021 |
| № 2866 | S18 | W31 | 17 | 0400 | Beta | Sep 10, 2021 | Sep 17, 2021 | Oct 1, 2021 |
| № 2864 | N24 | W88 | 01 | 0050 | Alpha | Sep 6, 2021 | Sep 13, 2021 | Sep 27, 2021 |
| № 2863 | S17 | W90 | 01 | 0030 | Alpha | Sep 6, 2021 | Sep 13, 2021 | Sep 27, 2021 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1992 to September 2021. The gray background is the average SSN index.
