Caracterización sísmica de la falla de Alhama de Murcia

Abstract

The Alhama de Murcia fault (AMF) is one of the most active faults of the Iberian Peninsula and the source of the Lorca 2011 earthquake that caused significant damage including several casualties. This NE-SW oblique fault, extended more than 100 km, has been extensively mapped to characterize its surface structure but almost no information is available of the structure and geometry at depth. This is specially significant in order to correctly interpret the obtained paleoseismic data considering that the knowledge of the structural relationship in depth between different branches of the fault is necessary. Accordingly, and within the InterGEO project, a 2D seismic reflection acquisition experiment was carried out along the AMF, focusing in the more interesting segments in the Lorca-Totana area. In this work we present the very first results of the acquired seismic reflection profiles that show the first structural image in depth of this fault which allow us to understand the seismic behaviour of the fault, and determine its relevance in seismic hazard.