English: The highest (southern) peak of the Boösaule Montes, which is the highest peak on Io, as imaged by Voyager 1. North is to the upper left. This image was created from PIA00323 by cropping and sharpening. NASA's description of the uncropped image is as follows:

The eruption of Pele on Jupiter's moon Io. The volcanic plume rises 300 kilometers above the surface in an umbrella-like shape. The plume fallout covers an area the size of Alaska. The vent is a dark spot just north of the triangular-shaped plateau (right center). To the left, the surface is covered by colorful lava flows rich in sulfur.