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First arrival traveltime tomography for complex near-surface velocity structures

Abstract : Classical algorithms used for travel time tomography are not necessarily well-suited for handling very large seismic data sets, densely parameterized velocity models and for taking advantage of current supercomputers architecture. We revisit the classical approach of first-arrival travel time tomography by proposing to use a simple gradient-based approach without the need of estimating the inverse of the Hessian of the misfit function. The gradient-based approach is very attractive from a numerical point as it can handle large data sets and velocity models and is very robust with respect to the choice of the initial velocity model.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00535842
Contributor : Herve Chauris <>
Submitted on : Saturday, November 13, 2010 - 1:32:29 PM
Last modification on : Thursday, September 24, 2020 - 4:34:06 PM

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  • HAL Id : hal-00535842, version 1

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Mark Noble, Cédric Taillandier, Hervé Chauris. First arrival traveltime tomography for complex near-surface velocity structures. 71st EAGE Conference and Technical Exhibition, Eur. Ass. of Geoscientists and Engineers, Jun 2009, Amsterdam, Netherlands. pp.P122. ⟨hal-00535842⟩

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