Jeffrey Bruce Johnson¹, Jacob Anderson¹, Silvio De Angelis², Rudiger P Escobar-Wolf³, John J Lyons⁴, Hans-Peter Marshall¹ and Armando Pineda⁵, (1)Boise State University, Department of Geosciences, Boise, ID, United States, (2)University of Liverpool, Liverpool, United Kingdom, (3)Michigan Technological Univ., Houghton, MI, United States, (4)USGS Alaska Volcano Observatory, Anchorage, AK, United States, (5)independent, Guatemala City, Guatemala