Wave equation dispersion inversion using a difference approximation to the dispersion-curve misfit gradient

Zhendong Zhang, Gerard T. Schuster, Yike Liu, Sherif M. Hanafy, Jing Li

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We present a surface-wave inversion method that inverts for the S-wave velocity from the Rayleigh wave dispersion curve using a difference approximation to the gradient of the misfit function. We call this wave equation inversion of skeletonized surface waves because the skeletonized dispersion curve for the fundamental-mode Rayleigh wave is inverted using finite-difference solutions to the multi-dimensional elastic wave equation. The best match between the predicted and observed dispersion curves provides the optimal S-wave velocity model. Our method can invert for lateral velocity variations and also can mitigate the local minimum problem in full waveform inversion with a reasonable computation cost for simple models. Results with synthetic and field data illustrate the benefits and limitations of this method. © 2016 Elsevier B.V.
Original languageEnglish (US)
Pages (from-to)9-15
Number of pages7
JournalJournal of Applied Geophysics
Volume133
DOIs
StatePublished - Jul 26 2016

Fingerprint Dive into the research topics of 'Wave equation dispersion inversion using a difference approximation to the dispersion-curve misfit gradient'. Together they form a unique fingerprint.

Cite this