HINTS ON THE SEISMIC HAZARD OF L'AQUILA HISTORICAL CENTRE THROUGH THE GEOLOGICAL INTERPRETATION OF HIGH-RESOLUTION SEISMIC REFLECTION INVESTIGATION

Introduction.We present the updated geological subsoil model of L'Aquila via the study of a high-resolution seismic reflection 1000 m-long profile located in the main street crossing the historical centre (Corso section) (Fig. 1). The Corso section was geologically interpreted through the integration of the seismic refraction tomography, the cross-check of borehole stratigraphy, and detailed geological survey data (Del Monaco et al., 2013; Nocentini et al., 2017). The main goals were the reconstruction of the buried top surface of the Meso-Cenozoic bedrock providing the 3D model essential to estimate the seismic site amplification through numerical modelling and to evaluate the existence of possible active faults in L'Aquila historical centre. From a more speculative point of view, the geophysical investigation allowed us also to improve the Plio-Quaternary tectono-stratigraphic evolution of the Western L'Aquila Basin in which L'Aquila historical centre is located.