From http://www.jpl.nasa.gov/galileo/


                Four Views of the Volcano Euboea Fluctus On Io
                                       
   
   
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Four views of the volcano Euboea Fluctus on Io

   
   
   Four views of Euboea Fluctus on Jupiter's moon Io showing changes seen
   on June 27th, 1996 by the Galileo spacecraft as compared to views seen
   by the Voyager spacecraft during the 1979 flybys. Clockwise from upper
   left is a Voyager 1 high resolution image, a Galileo enhanced color
   image, a Galileo image with simulated Voyager colors, and a Voyager 2
   color image. North is to the top of the picture. The Galileo images
   show new diffuse deposits which have an unusual morphology for plume
   deposits. A diffuse yellowish deposit with a radius of 285 km extends
   to the northwest, whereas an intense reddish deposit marks a curving
   fallout margin to the southeast. This morphology may have resulted
   from the presence of a topographic obstruction to southeast of the
   vent.
   
   The Jet Propulsion Laboratory, Pasadena, CA manages the mission for
   NASA's Office of Space Science, Washington, DC.
   
   This image and other images and data received from Galileo are posted
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   educational context for the images can be found at URL
   http://www.jpl.nasa.gov/galileo/sepo.