Cloud Layers East of the Great Red Spot
Jet Propulsion Laboratory https://www.jpl.nasa.gov/ Jan. 29, 1996
This color view of the region just to the East of the Great Red Spot was taken by Voyager 1 on March 4, 1979 at a distance of 1,000,000 miles (1,800,000 km). Differences in cloud color may indicate relative heights of the cloud layers but the exact relationship between color and height has not yet been established. The smallest clouds seen in this picture are approximately 20 miles (30 km) across.