Hannah R Dietterich, U.S. Geological Survey Alaska Volcano Observatory, Anchorage, AK, United States, Matthew R Patrick, USGS, Hawaiian Volcano Observatory, Hawaii Volcanoes National Park, HI, United States, Angela K. Diefenbach, USGS, Cascades Volcano Observatory, Vancouver, WA, United States, Paul Lundgren, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, Katharine V Cashman, University of Bristol, Bristol, United Kingdom and Gordon Grant, Oregon State University, Corvallis, OR, United States