Galileo finds a cousin of Kilauea on Io

November 12, 1999

A volcano similar to Hawaii's Kilauea has been photographed on Jupiter's moon Io by the Nasa space probe Galileo.

The active crater, known as Prometheus, is several times larger than its terrestrial counterpart but has many physical similarities, exciting earth scientists who have been waiting for a high-resolution image of Io's surface for many years.

The new images taken by the Nasa spacecraft's camera and near-infrared mapping spectrometer show the northeastern end of the volcano consists of a lava filled caldera some 28km long.

It is thought this is the vent where the molten rock rises to the surface. It is then transported westwards through lava tubes for about 100km before breaking out onto the surface.

Here the lava interacts with snow and forms a plume up to 100km tall. Laszlo Keszthelyi, a Galileo research associate at the University of Arizona, Tucson, said: "Both volcanoes are long-lived eruptions, with flows that apparently travel through lava tubes and produce plumes

when they interact with cooler materials."

Kilauea has a small lava lake about 100m across from which lava is transported 10km in lava tubes into the Pacific Ocean.

There, large steam plumes are generated by the interaction of the lava and the ocean.

The Prometheus data were gathered on October 10, and much of it is still being transmitted to Earth. Another Io fly-by is planned for November 25.

These swoops are risky, because of the intense radiation from Jupiter's radiation belts, and they have been scheduled for the final portion of Galileo's mission.

You've reached your article limit

Register to continue

Registration is free and only takes a moment. Once registered you can read a total of 10 articles each month, plus:

  • Sign up for the editor's highlights
  • Receive World University Rankings news first
  • Get job alerts, shortlist jobs and save job searches
  • Participate in reader discussions and post comments
Register

Have your say

Log in or register to post comments

Featured Jobs

Business Development Officer YORK ST JOHN UNIVERSITY
Lecturer in Linguistics YORK ST JOHN UNIVERSITY
Associate Professor/Professor EDINBURGH NAPIER UNIVERSITY

Most Commented

Brexit, EU referendum

Joanna Williams voted Leave, and has been left disappointed by the academy’s reaction to the EU referendum result

Elly Walton illustration (7 July 2016)

Researchers in the liberal arts seem to have made it their mission to communicate in the most obscure fashion, says Zachary Foster

Daniel Mitchell illustration (14 July 2016)

Frank Furedi says the mournful mood on campus and the disparagement and silencing of Leave supporters betray an isolated scholarly class

Michael Parkin illustration (7 July 2016)

Rising immigration-related costs and lack of employer support send an unwelcoming message to international staff, says Jason Danely

Huge eyes peering through door windows

Some scholars claim plans are more about improving staff visibility to students than brightening corridors