Cosesimic liquefaction phenomena from DInSAR after the May 20, 2012 Emilia earthquake
Auteurs
M. Albano, M. Saroli, G. Modoni, M. Chini, M. Moro, C. Bignami, L. Pulvirenti, N. Pierdicca, E. Falcucci, S. Gori, and S. Stramondo
Référence
Rendiconti online della societa' geologica italiana, vol. 35, pp. 5-9, 2015
Description
In this paper, we have investigated the capability of Differential Interferometry Synthetic Aperture Radar (DInSAR) technique to detect the ground effects induced by liquefaction phenomena occurred during the May 20, 2012 Emilia earthquake. To this aim, a set of COSMO-SkyMed (CSK) SAR images covering the coseismic phase has been used. The detected surface effects have been related to liquefaction of deep sandy layers. Thanks to the geological/geotechnical data in the area and a liquefaction susceptibility analysis of the subsoil, it has been identified a sandy layer between 9 and 13 m in deep, which probably liquefied during the earthquake. The estimated vertical displacements due to liquefaction are comparable with the values measured by DInSAR.
