Geology and topography of RA Patera, Io, in the Voyager era: Prelude to eruption

Details Geology and topography of RA Patera, Io, in the Voyager era: Prelude to eruption Geology and topography of RA Patera, Io, in the Voyager era: Prelude to eruption

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2467s&link_type=abstract

Geophysical Research Letters, vol. 24, p. 2467

Physics

12

Fluid Flow, Satellite Surfaces, Extraterrestrial Environments, Atmospheric Composition, Volcanoes, Space Probes, Imaging Techniques

Scientific paper

Voyager era stereo images are used to map the geology and topography of Ra Patera (a major active volcanic center and possible site of sulfur eruptions on Io). The summit of Ra Patera reaches only approximately 1 km above the surrounding plains. Pre-Voyager-era lava flows occur on slopes of 0.1-0.3 deg, comparable to the lunar mare. These flows were emplaced at either low viscosities, high eruption rates, or both. A 600-km-long ridged mountain unit (rising to approximately 8 km near Carancho Patera) forms a 60 by 90 km wide plateau approximately 0.5 km high 50 km east of Ra Patera. The new lava flows observed by Galileo flowed around the southern edge of this plateau.

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