Daulet Magzumov
Seismic surface wave interferometry for near surface characterization.
Rel. Farbod Khosro Anjom. Politecnico di Torino, Master of science program in Georesources And Geoenergy Engineering, 2025
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Abstract
This thesis examines the use of seismic surface-wave interferometry for near-surface characterization from ambient noise records. An artificial sand body at the CNR experimental site was being monitored using a dense receiver array. By analysing the cross-correlations of ambient noise between receiver pairs, we can extract empirical Green’s functions and Rayleigh-wave dispersion curves.We accessed over 7000 receiver paths and selected 2130 reliable dispersion curves for inversion. Resulting estimates were a Vs distribution to almost 5 m depth. Two types of inversion schemes were tested; unconstrained and constrained. Although a similar data misfit (≈11.7%) was achieved by both models, the Vs model resulting from the constrained inversion was found to be more realistic, as it increased smoothly from 100–130 m/s at the surface to 250–270 m/s at depth.
A high-velocity area in shallow layers connected to strong traffic noise from the road in the north influenced part of the data
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