The MVRRS (Mitigation of Volcanic Risk by Remote Sensing techniques) project lead by the Open University (U.K.) is devoted to the development and application of modern remote sensing techniques to the mitigation of volcanic risk on European volcanoes, using existing and future spaceborne and airborne platforms. The primary objective is dictated by two considerations: First, the rapid developments in remote sensing science in recent years and the numerous sophisticated sensors planned for the near future provide powerful new tools for monitoring volcanoes. Second, the increasing population densities and technological complexity of volcanic regions in Europe dictate that the potential risks of any eruption are also increasing. These risks range from the loss of aircraft through...