Modelo de la estructura de basamento e identificación de fuentes sismogenéticas en la Depresión del Bajo Segura (Murcia-Alicante)

Abstract

In this work we have carried out a geophysical and seismotectonic study in order to identify and characterise the seismogenetic sources or Bajo Segura actives faults. The main method used is the structural interpretation of gravity data. This method is combined with geological-structural and geomorphological studies, as well as historical and instrumental seismicity data. Several of the strongest earthquakes recorded in the Spanish historical catalogue occurred in this region, among them, the Torrevieja earthquake of 1829. Often, this activity is related to blind faults in the basin interior, that are covered by neogene and plioquaternary deposits. Different faults systems related to the neotectonic stress field and coherent with border structures, may explain this activity.