To refer to this page use:
|Full-waveform inversion (FWI) is a powerful method for estimating the earth’s material properties. We demonstrate that surface-wave-driven FWI is well-suited to recovering near-surface structures and effective at providing S-wave speed starting models for use in conventional body-wave FWI. Using a synthetic example based on the SEG Advanced Modeling phase II foothills model, we started with an envelope-based objective function to invert for shallow large-scale heterogeneities. Then we used a waveform-difference objective function to obtain a higher-resolution model. To accurately model surface waves in the presence of complex tomography, we used a spectral-element wave-propagation solver. Envelope misfit functions are found to be effective at minimizing cycle-skipping issues in surface-wave inversions, and surface waves themselves are found to be useful for constraining complex near-surface features.
|Borisov, Dmitry, Ryan Modrak, Fuchun Gao, and Jeroen Tromp. "3D elastic full-waveform inversion of surface waves in the presence of irregular topography using an envelope-based misfit function." Geophysics 83, no. 1 (2018): R1-R11. doi:10.1190/GEO2017-0081.1.
|R1 - R11
|Type of Material:
Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.