TY  - JOUR
A1  - Guillemoteau, Julien
A1  - Vignoli, Giulio
A1  - Barreto, Jeniffer
A1  - Sauvin, Guillaume
T1  - Sparse laterally constrained inversion of surface-wave dispersion curves via minimum gradient support regularization
JF  - Geophysics
N2  - We have developed a 1D laterally constrained inversion of surface-wave dispersion curves based on the minimum gradient support regularization, which allows solutions with tunable sharpness in the vertical and horizontal directions. The forward modeling consists of a finite-elements approach incorporated in a flexible nonparametric gradient-based inversion scheme, which has already demonstrated good stability and convergence capabilities when tested on other kinds of data. Our deterministic inversion procedure is performed in the shear-wave velocity log space as we noticed that the associated Jacobian indicates a reduced model dependency, and this, in turn, decreases the risks of local nonconvexity. We show several synthetics and one field example to demonstrate the effectiveness and the applicability of the proposed approach.
KW  - surface wave, inversion, near surface
Y1  - 2022
U6  - https://doi.org/10.1190/GEO2021-0247.1
SN  - 0016-8033
SN  - 1942-2156
VL  - 87
IS  - 3
SP  - R281
EP  - R289
PB  - Society of Exploration Geophysicists
CY  - Tulsa, Okla.
ER  -