GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 2.2 GNGTS 2024 We collected and organized all available informaCon in a dedicated geographic informaCon system (GIS, Fig. 1) and reprocessed the earthquake records of all temporary seismological staCons in the area. Fig. 1: The study area in the Po plain, near the city of Ferrara: on the lep, noise measurements and seismic staCon posiCon; on the right, Vs profiles available. Since the Ferrara area is located in the alluvial deposits, far from rocks on the surface, the standard approach of spectral raCo to the reference site is not applicable for the assessment of FAs. To circumvent this, we computed the amplificaCon funcCon using the generalized inversion technique (GIT), using as reference site a virtual site (as proposed by Laurenzano et al., 2017) that mimics the condiCons of the reference site considered by the building code (class A soil, with Vs=800 m/s). Due to the large amount of Vs profiles and data available at the Casaglia well, we constrained the virtual site at the surface and calculated the seismic ground moCon parameters (PGA, PGV, FA, etc.). We plan to extend the pointwise results at the seismic network sites by a cluster analysis applied to the denser network of noise measurements and the Vs profiles, and compare the results with the numerical predicCons of the one-dimensional approach. References Bordoni P., Azzara R. M., Cara F., Cogliano R., Cultrera G., Di Giulio G., Fodarella A., Milana G., Pucillo S., Riccio G., Rovelli A., Augliera P., Luzi L., LovaC S., Massa M., Pacor F., Puglia R., Ameri G.; 2012: Preliminary results from EMERSITO, the rapid response network for site effect studies. Annals of Geophysics, 55, 4, 599-607; DOI: 10.4401/ag-6153 Falcone G., Acunzo G., Mendicelli A., Mori F., Naso G., Peronace E., Porchia A., Romagnoli G., Tarquini E., Moscatelli M., 2021. Seismic amplificaCon maps of Italy based on site-specific