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Animation of Pele and Tvashtar's Plumes This animation, composed of UV3 frames from the Cassini Imaging Science Subsystem (ISS) taken on 2 January 2001 and magnified by a factor of 2, shows plumes from Io's Tvashtar and Pele Paterae (volcanoes). NASA / JPL-Caltech / SSI / Gordan Ugarkovic