Using Multi-Frequency Insar Data to Constrain Ground Deformation of Ischia Earthquake

In this study, multi-frequency Synthetic Aperture Radar Interferometry (InSAR) data are used to constrain the ground deformation due to the August 21 st , 2017, Ischia earthquake. InSAR results are the input data to infer the source model of the seismic event. C-band Sentinel-l and X-band COSMO-SkyMed© InSAR results show a displacement pattern in the epicentral area, with a maximum value of ~3.5 cm and a dominant vertical component. Preliminary analytical and numerical models suggest that the retrieved InSAR ground displacements are due to the combination of two phenomena: the tectonic dislocation caused by the slip on the fault plane and the surficial disnlacernent caused by the triggering of shallow landslides.