Looking at fault reactivation matching structural geology and seismological data

We analyse the coseismic elastic static stress changes due to the occurrence of the normal fault events in order to investigate the mechanical coupling and interaction between the NW-SE oriented normal fault system and the intervening N10° inherited fault. We show that the elastic stress perturbation increased on the shallow portion of the activated volume where the N10° structure is located, and promoted its reactivation with a strike-slip motion. The different amount of slip experienced along the two normal faults responsible for the greater mainshocks favoured the left-lateral strike-slip kinematics.