GNGTS 2019 - Atti del 38° Convegno Nazionale

72 GNGTS 2019 S essione 1.1 portion of the Avella ridge. The first results deriving from structural observations indicate that: 1) the major border faults have a multiphase kinematics; 2) the second determined extension axis (NE-SW) is in agreement with the active strain axis in the Apennines (e.g., Montone and Mariucci, 2016); 3) the first extension axis is not consistent with the Apennines active strain axis. To investigate in detail the background seismicity and, in particular, to identify active seismogenic volumes, the seismic events that occurred between 2005 and 2017 in and around the Campanian Plain has been analyzed. Starting from the INGV instrumental catalogue, we selected the seismic events with M L >1.5 occurred in the study area. In order to perform a relocation of the seismicity, the waveforms of the selected events have been collected to carry Fig. 1 - DEM of the northern Campania region showing a measured and supposed faults. Blu arrow indicate the extensional T axis defined by S1 slip lineation; yellow arrow, T axis defined by S2 slip lineation. Purple circles represent the epicentral distribution of the relocated seismicity between 2005 and 2017 in the study of area. Coloured boxes indicates the three ridges (CR-Caserta Ridge, AR-Avella Ridge, SR-Sarno Ridge) analyzed in this work.