GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 3.2 ___ GNGTS 2023 Resonance vs. shape of sedimentary basins S. Castellaro 1 , G. Musinu 2 Sediment-filled basins are of interest both in exploration geophysics, and in earthquake seismology, to assess their potential to amplify ground shaking. The dynamic behavior of sedimentary basins can be studied in the frame of 1D plane-parallel conditions, when the aspect ratio of the basin is very low (Figure 1a) or is more typically addressed by means of 3D numerical models, trying to replicate the real case (Figure 1c). The latter requires the knowledge of a large number of geometrical and mechanical parameters, which are often not completely available. Between the idealized 1D (equivalent in all the horizontal axes) and the real 3D cases, an intermediate 2D idealized case (being the third dimension infinite) can be conceived (Figure 1b), whose properties constitute an important and non-fully systematically explored link between the 1D to the 3D cases, at least by means of numerical models. 2 ENSER srl, Faenza 1 Dipartimento di Fisica e Astronomia – Alma Mater Studiorum Università di Bologna