Matthew M Haney, U.S. Geological Survey Alaska Volcano Observatory, Anchorage, AK, United States, John J Lyons, USGS Alaska Volcano Observatory, Anchorage, AK, United States, John A Power, USGS, Alaska Volcano Observatory, Anchorage, AK, United States and Diana C. Roman, Carnegie Institution for Science, Department of Terrestrial Magnetism, Washington, DC, United States