Active faulting and seismotectonics in central italy: Lesson learned from the past 20 years of seismicity. engineering clues

We present a review of the geological knowledges on the seismogenic faults and fault systems that activated during the last three major seismic sequences in central Italy, since the Colfiorito seismic sequence of 1997. Information describing the Quaternary activity of the causative fault systems have been matched with the geological effects – in terms of surface faulting – caused by the seismic sequences and with moment tensor solutions of a selection earthquakes among the mainshocks, both considering those already published and making new solutions for the mainshock of the 2016 seismic sequence on the Mt. Vettore-Mt. Bove fault and for the major four events occurred on the 18 January 2017 along the Campotosto fault. General considerations in terms of seismotectonics of the central Apennines have been provided, which have implications in terms of defining the effectiveness of neotectonic studies to assess seismogenic potential for a given active fault and to evaluate surface fault displacement hazard.