GNGTS 2017 - 36° Convegno Nazionale

172 GNGTS 2017 S essione 1.2 In this work, we try to clarify some of these aspects by means of geological interpretation of seismic reflection profiles. Though conceived for oil exploration, recent works have demonstrated that the use of seismic reflection profiles can help to unravel the depth geometry of the seismogenic faults as well as the rocks involved in the seismic ruptures. We present a deep geological reconstruction of the area interested by the Mw 6.5 event, along a 54 km long ENE-WSW section crossing the Norcia and Mt. Vettore seismogenic faults and the M. Sibillini thrust (Fig. 1). This section was constructed by means of integration of surface geology and subsurface data. The results of this work propose to give new insights on the subsurface structure of the area affected by the seismic sequence, focusing on: - the along-dip geometry of the main faults activated during the 2016-2017 sequence; - their relationships with pre-existing faults (thrusts, normal faults, transfer faults); - the lithologies where the main shocks are nucleated. Fig. 1 - Structural sketch of the area affected by the 2016-2017 seismic crisis with the nine main shocks from 24August 2016 to 30 January 2017 and the two focal mechanisms of the Mw 6.0 (24August 2016) and Mw 6.5 (30 October 2017) mainshocks.