Automatic Surface Wave Dispersion Curve Picking and Symbolic Calculation Inversion

Surface waves which are often seen as a noise to be filtered out are now more and more used to characterize the near surface. In this work we follow the two-steps scheme based on the 1D stratified media assumption: picking of the dispersion curves and inversion to derive a shear wave depth profile. Classical methods depend on manual or semi-automatic picking. Our motivation is to minimize the impact of lateral heterogeneity and replace the manual picking. Interferometry picking allows automatic and more robust picking, which shortens processing time and reduces costs. Symbolic calculation enables to use an inversion scheme dedicated to our specific problem, which is more reliable and delivers consistent shear velocity profile.