Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2844 | S43 | E59 | 01 | 0020 | Alpha | Jul 23, 2021 | Jul 30, 2021 | Aug 15, 2021 |
| № 2843 | S17 | W72 | 03 | 0030 | Beta | Jul 13, 2021 | Jul 19, 2021 | Aug 2, 2021 |
| № 2842 | N25 | W00 | 01 | 0020 | Alpha | Jul 18, 2021 | Jul 25, 2021 | Aug 8, 2021 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1992 to July 2021. The gray background is the average SSN index.
