Remote sensing techniques applied to the stability analysis of the Calitri landslide (southern Italy).

Regular and continuous monitoring is required for the prevention and mitigation of a variety of instability phenomena: it provides solutions to mitigate and minimize disaster losses and the hazard to human life. The objective is to verify the suitability of remote sensing methods as complementary tools for monitoring slow-moving landslides. By comparing interferometric and GNSS results with conventional ground-based data, we aim to improve stability studies of the Calitri landslide. Calitri, a town in the Avellino province, is located within the Campanian segment of the southern Apennine chain on the left side of the Ofanto river and, since historical time, its southern slope has been affected by a large roto-translational landslide that evolved into an earthflow. The last reactivation occurred after the main shock of the Campania-Basilicata earthquake (November 23, 1980, Mw=6,9) and it mobilized the silty and marly clays and sands of Ruvo del Monte and Andretta synthem. We will illustrate the integration of the GNSS RING network with the creation of an ad hoc network and the analysis of interferometric data (C and X bands) to obtain a complete view of the kinematics in place.