Cynthia A Werner, USGS - Contractor, New Plymouth, New Zealand, Tobias P Fischer, University of New Mexico, Department of Earth and Planetary Sciences, Albuquerque, NM, United States, Alessandro Aiuppa, Università di Palermo, Dipartimento di Scienze della Terra e del Mare (DiSTeM), Palermo, Italy, Marie Edmonds, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, Carlo Cardellini, Università di Perugia, Dipartimento di Fisica e Geologia, Perugia, Italy, Simon A Carn, Michigan Technological University, Department of Geological and Mining Engineering & Sciences, Houghton, MI, United States, Giovanni Chiodini, INGV, Bologna, Italy, Elizabeth Cottrell, Smithsonian, NMNH, Washington, DC, United States, Michael Richard Burton, University of Manchester, School of Earth and Environmental Science, Manchester, United Kingdom, Hiroshi Shinohara, Geological Survey Japan AIST, Tsukuba, Japan and Patrick Allard, CNRS, Paris 05, France