Surface Deformation in Northeast Italy by using time series InSAR techniques with Sentinel-1 data

• DOI: 10.5194/egusphere-egu2020-10549
• Publication Date: 2020-03-09T21:42:26Z
• Authors: Giulia Areggi; Cristiano Tolomei; Lorenzo Bonini; Giuseppe Pezzo
• Keywords: Decorrelation; GNSS augmentation

<p>Geodetic data provide useful information on surface deformation over long period of time. Applying time series methods to geodetic data, several phenomena were studied. In particular, the potentials exploited detect and measure slow tectonic signals such as interseismic strain accumulation. During period, when faults are locked, an accumulation can occur in response active stresses. Considering that energy be released through earthquakes, estimation long-term rate reveals itself a approach for seismic hazard investigations. this study, we used remote sensing Synthetic Aperture Radar evaluate ground Southeastern Alps (Northeastern Italy), area characterized by convergent regime (Adria plate motion is ~ 2mm/yr) well structures. We SAR images provided Sentinel-1A/B satellites spanning 2015-2019 temporal interval applying multi Small Baseline Subset Interferometry (SBAS) technique. The method based combination large number interferograms small geometric baseline order reduce decorrelation effects increase spatial coverage interest. outcomes consist displacement mean velocity map each coherent pixels with respect satellite Line-of-Sight (LoS). Some detected patterns attributed subsidence phenomena, affecting plain under analysis, due compaction sediments.</p>