Department of Geological Sciences (DEPARTMENT OF GEOLOGICAL SCIENCES) ; University of Texas at Austin
Institut des Sciences de la Terre d'Orléans (ISTO) ; CNRS - INSU - Université d'Orléans (UO)
Departement of Geology ; University of Alaska, Anchorage
This research was generously supported by the Alaskan Volcano Observatory and a research grant to J.G. from the National Science Foundation (EAR-0401784).