High-resolution geoelectrical tomographies in the study of Giarrossa landslide (Southern Italy).

New geoelectrical techniques have been applied to the study of the Giarrossa landslide in the Lucano Appennines of southern Italy. Dipole–dipole electrical resistivity tomographies (ERT) and selfpotential (SP) surveys were carried out using innovative techniques for data acquisition and inversion. The ERT showed the presence of a conductive zone at a depth of about 25–35 m associated with the landslide body and some shallow high-resistivity nuclei associated with intercalations (calcilutitic, calcarenitic blocks, etc.) in the disturbed material. Two SP areal surveys, undertaken after the winter and summer seasons, highlighted equipotential contours following the landslide boundary and an electrical field predominantly negative in the source zone and positive in the accumulation zone