Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 2671 | N11 | E51 | 20 | 0380 | Beta-Gamma-Delta | Aug 22, 2017 | Aug 28, 2017 | Sep 11, 2017 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1988 to August 2017. The gray background is the average SSN index.
