A new study points to why, and how, Io became the most volcanic body in the solar system.
Scientists with NASA's Juno mission to Jupiter have discovered that the volcanoes on Jupiter 's moon Io are each likely powered by their own chamber of roiling hot magma rather than an ocean of magma. The finding solves a 44-year-old mystery about the subsurface origins of the moon's most demonstrative geologic features.
"Since Morabito's discovery, planetary scientists have wondered how the volcanoes were fed from the lava underneath the surface," said Scott Bolton, Juno principal investigator from the Southwest Research Institute in San Antonio."Was there a shallow ocean of white-hot magma fueling the volcanoes, or was their source more localized? We knew data from Juno's two very close flybys could give us some insights on how this tortured moon actually worked.
The Juno team compared Doppler data from their two flybys with observations from the agency's previous missions to the Jovian system and from ground telescopes. They found tidal deformation consistent with Io not having a shallow global magma ocean.
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