Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 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
The average monthly sunspot number (SSN) from January 1992 to September 2021. The gray background is the average SSN index.
