Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 9, 2017. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2670 | S05 | W19 | 01 | 0140 | Alpha | Aug 8, 2017 | Aug 15, 2017 | Aug 29, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to August 2017. The gray background is the average SSN index.
