Swarms of small volcano-tectonic events preceding paroxysmal explosions of Tungurahua volcano (Ecuador)

Jean Battaglia1, Silvana Hidalgo2, Jean-Michel Douchain3, Daniel Alejandro Pacheco2, Jorge Cordova2, Alexandra Patricia Alvarado2 and René Parra4, (1)Laboratoire Magmas et Volcans, Université Clermont Auvergne - CNRS - IRD, Clermont Ferrand, France, (2)Instituto Geofísico de la Escuela Politécnica Nacional, Quito, Ecuador, (3)Laboratoire Magmas et Volcans, Université Blaise Pascal - CNRS - IRD - OPGC, Clermont Ferrand, France, (4)Universidad San Francisco de Quito, Quito, Ecuador