Gravimetric, Mt and Electric Surveys of a N.E. Sicily Regional Fault System

We present the first results of a geophysical survey carried out on the northeastern Sicily, in an area characterized by a complex structural setting and a significant seismic activity. In the area, 814 gravimetric stations were surveyed together with 27 deep electrical and MT soundings. The gravimetric data were corrected for the topographic effect up to 167 km from each station and interpreted through a 3D inversion procedure. The resulting density model shows the presence of large anomalous bodies, extending at depth, characterized by negative density contrasts. The MT data were processed using the determinant impedances to represent average impedance from which 1D interpretations of the single soundings were obtained. Electrical models were reconstructed along lines. A good correlation is found, both in location and extension, between low density and low resistivity bodies.