Rayleigh wave velocities and structural informations in Central Northern Italy

Abstract

Rayleigh wave dispersion has been observed along the three profiles<br />Trieste-Olbia, Olbia-Bologna and Olbia-Bolzano, in central-northern Italy.<br />The interpretation of phase velocities indicates a crustal thickness increasing<br />from East (25-30 km, Trieste-Olbia) to West (30-35 km, Olbia-Bolzano).<br />For each profile two values of the Moho depth are acceptable; the shallower<br />one is associated with a set of models which have low velocity<br />material (¡3=4.3 lcm/s) just under or within a few km from the Moho;<br />the deeper one still accepts low velocity material ((3=4.4 km/s) under<br />the Moho but does not exclude the presence of an almost normal LID<br />above the low velocity channel.