Io - Galileo

Volcanic plumes on Jupiter's satellite Io

This image of Io shows active volcanic plumes erupting from the surface. The image was taken by Galileo on its ninth orbit around Jupiter and merged with high resolution data from other orbits. To the left is a blue plume erupting over Pilan Patera. The plume is 140 km high and evidence of deposits from this eruption was seen on the following Io flyby. The shadow of another plume can be seen near the center of the frame. The shadow is reddish and extends to the right from the circular feature, which is the volcano Prometheus. This volcano was also erupting when Voyager flew by in 1979. Io is the most volcanically active body in the solar system. Io is 3640 km in diameter and north is up. (Galileo, P-49760)
Larger image (124K) jpg

High resolution tif file (7.8M)

Location & Time Information
Date/Time (UT): 1997-06-28
Distance/Range (km): 600,000.
Central Latitude/Longitude (deg): N/A
Orbit(s): Flyby

Imaging Information
Area or Feature Type: global view
Instrument: Solid State Imaging CCD Camera
Instrument Resolution (pixels): 800 x 800, 8 bit
Instrument Field of View (deg): 0.46 x 0.46
Filter: N/A
Illumination Incidence Angle (deg): N/A
Phase Angle (deg): N/A
Instrument Look Direction: N/A
Surface Emission Angle (deg): N/A

Ordering Information
CD-ROM Volume: N/A
NASA Image ID number: P-49760
Other Image ID number: N/A
NSSDC Data Set ID (Photo): NSD XD-12A
NSSDC Data Set ID (CD): N/A
Other ID: N/A


[NASA Logo] Authors/Curators:

Dave Williams,, (301) 286-1258
Code 690.1, NASA Goddard Space Flight Center
Greenbelt, MD 20771, USA

Jay Friedlander,, (301) 286-7172
Code 612.4, NASA Goddard Space Flight Center
Greenbelt, MD 20771, USA

NASA Official: Ed Grayzeck,

Last updated: 24 September 2015