Advances in the hazards evaluation for the Laguna del Maule volcanic complex

Abstract:

The Laguna del Maule Volcanic Complex is an unique eruptive center in Central Chile, where has been recognized the largest post-glacial silicic volcanism expression of the Andean Southern Volcanic Zone. It has kept the attention of scientists worldwide since the identification of a high deformation at its south-west side, and therefore the geological knowledge of the system has significantly increased in the last years. The volcanic complex is characterized by the presence of more than 30 eruptive post-glacial vents related to both effusive and explosive activity and pyroclastic deposits has been recognized in both Chilean and Argentinean territories. This work presents advances in the generation of an updated volcano hazards map carried out by the Chilean Geological and Mining Survey (SERNAGEOMIN). Consequently, areas affected by past lahars, pyroclastic density currents and tephra fall have been identified. In addition, based upon recent geological and geophysical evidence, a susceptibility analysis was done in order to establish the spatial probability of a future vent opening. The map will be a significant tool for the development of emergency plans along the Maule river valley.