ANALYSIS OF DENSE 3D SEISMIC DATA AROUND THE SCROVEGNI CHAPEL IN PADUA, ITALY

In this thesis, a comprehensive 3D seismic survey was conducted in the vicinity of the Scrovegni Chapel in Padua, Italy, utilizing a combination of surface wave analysis and 3D refraction tomography. The survey used 188 nodes strategically positioned around the Scrovegni Chapel, and 28 active shots were fired within the survey area. The analysis focused on extracting travel times from the phases of the signal to analyse the fundamental mode of surface waves, specifically Rayleigh waves. Eikonal Tomography was employed to generate phase velocity maps, while the amplitude of the surface waves was examined to produce auto-spectrum gradient maps. The Geogiga software is used to produce the 3D refraction tomography. Given the particulars of 3D refraction tomography, a preliminary exploration involved 2D initial model and 2D refraction tomography to fine-tune the parameters crucial for the subsequent 3D refraction tomography. The collaborative examination of surface wave analysis and 3D refraction tomography enabled the identification of noteworthy features, including two Roman walls and buried remnants of World War II structures. This collaborative approach underscores its utility for future shallow surveys.