PIA01514: Io Surface Deposits and Volcanic Craters

Io Surface Deposits and Volcanic Craters


This picture of Io, the innermost Galilean satellite, was taken by Voyager 1 on the morning of March 5, 1979 at a range of 377,000 kilometers (226,200 miles). The smallest features visible are about 10 kilometers (6 miles) across. The reddish, white and black areas are probably surface deposits, possibly consisting of mixtures of salts, sulfur and sublimate deposits of possible volcanic origin. Many of the black spots in these pictures are associated with craters of possible volcanic origin. The lack of impact craters on Io suggests that the surface is relatively young compared to the other Galilean satellites and some of the terrestrial planets such as Mercury and the Moon.

Background Info:

JPL manages and controls the Voyager project for NASA's Office of Space Science.

Cataloging Keywords:

Name Value Additional Values
Target Io Earth, Jupiter, Mercury, Moon
System Jupiter Earth
Target Type Satellite Earth, Planet
Mission Voyager
Instrument Host Voyager 1
Host Type Flyby Spacecraft
Instrument Imaging Science Subsystem (ISS)
Extra Keywords Color, Crater, Volcano
Acquisition Date
Release Date 1999-03-13
Date in Caption 1979-03-05
Image Credit NASA/JPL
Source photojournal.jpl.nasa.gov/catalog/PIA01514
Identifier PIA01514