H. Masursky R.G. Strom R.J. Terrile M. H. Carr 1979 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. ?? 1979 Nature Publishing Group. application/pdf 10.1038/280729a0 en Volcanic features of Io article