GNGTS 2016 - Atti del 35° Convegno Nazionale

480 GNGTS 2016 S essione 3.1 30-35 km below the Murge-Salento (Giese and Morelli, 1975). The seismicity of the Apulo-Adriatic region is mainly concentrated in the first 100 km of lithosphere and is distributed in correspondence to the Apenninic and Dinaric chains. The study of focal mechanisms has allowed to distinguish a tectonic regime mainly extensional in the Apenninic chain from a mainly compressional one in the Dinaric-Hellenic chain (Anderson, 1987). The Adriatic-Ionian region constitutes then a relatively aseismic area, excluding epicenters of middle and shallow earthquakes offshore the Gargano and the Tremiti islands (Favali et al. , 1990). Fig. 1 – Location map of the seismic lines.