SAR interferometric monitoring of movements produced in ordinary masonry buildings during a seismic swarm

During a seismic swarm masonry buildings suffer stresses which often give rise to permanent deformation and, in extreme cases, lesions, and sometimes unavailability. When a large area is hit by a swarm, the number of buildings affected by this phenomenon, and potentially vulnerable, amounts to several thousand, giving rise to huge monitoring activity needs [1]. According to this reason, we decided to explore the methodology of differential SAR interferometry, which allows, in principle, to detect deformations of the order of a few millimeters within a comprehensive picture of a whole area.