Voyager 1 Image of Io
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PUBLIC INFORMATION OFFICE JET PROPULSION LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY NATIONAL AERONAUTICS AND SPACE ADMINISTRATION PASADENA, CALIF. 91109. TELEPHONE (213) 354-5011 PHOTO CAPTION P-26242 12/21/83
This view of the volcano Pele on Jupiter's satellite Io was obtained by Voyager 1 in March 1979. Pele, the first volcano discovered on Io, is also the largest geyserlike eruption observed there so far. The plume of the geyser rises above the limb of the satellite to a height of about 300 kilometers. Pele has deposited on the surface a concentric set of yellow and brown rings, the outermost of which averages about 1,400 kilometers in diameter. At the center of the deposit is the source of the geyser: a complex of hills with a central valley. Markings and flows are indicative of past eruptions of Pele, which was inactive when Voyager 2 flew past Io four months after Voyager 1. This view is a mosaic produced by Alfred S. McEwen of the U.S. Geological Survey, Flagstaff, Ariz. McEwen's technique uses high-resolution images for spatial detail and low-resolution images for color data. The Voyager project is managed for NASA by the Jet Propulsion Laboratory, Pasadena, Calif.