The role of SO2 in volcanism on Io

@article{Smith1979TheRO,
  title={The role of SO2 in volcanism on Io},
  author={B. A. Smith and Eugene Merle Shoemaker and Susan W. Kieffer and Allan F. Cook},
  journal={Nature},
  year={1979},
  volume={280},
  pages={738-743}
}
Io and Earth are the only planetary bodies known to be volcanically active; the energetics of the eruptive plumes on Io have important structural implications and are closely linked with the presence of sulphur and SO2. 
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Pyroclastic sulphur eruption at Poás volcano, Costa Rica
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Volcanic Activity on Io During the Galileo Era
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Volcanic activity is apparently higher on Io than on any other body in the Solar System. Its volcanic landforms can be compared with features on Earth to indicate the type of volcanism present on Io.
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Resurfacing rates and surface ages on Io are estimated, together with the material ejection and deposition rates of the active volcanic plumes.
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