Volcanoes erupting on Io

Volcanoes erupting on Io

. Several volcanic plumes are shown in this diagram, derived from Galileo observations of Io when Jupiter eclipsed the moon. Bright blue glows were observed emanating from the volcanic plumes, including the volcano Prometheus whose diffuse glow extended 800 kilometers from the edge of Io. The glow is probably molecular emission from sulfur dioxide, denoted SO2, known to be abundant in volcanic plumes. The eruptive centers are named after mythological figures such as Amirani, the Georgian god of fire, Culann, the Celtic smith god, Prometheus, the Greek god of fire, and Zamana, the Babylonian Sun, corn and war god. (Courtesy of PIRL, University of Arizona,)

Copyright 2010, Professor Kenneth R. Lang, Tufts University