NDLI: Parallel inversion of refracted travel times of P and SH waves using a function approximation

Content Provider	Springer Nature Link
Author	Ormos, T. Daragó, A.
Copyright Year	2005
Abstract	The paper discusses a possibility to determine refracting horizons and layer velocities with an inversion method. The basic idea for this method is that the lateral changes both in layer thicknesses and wave propagation velocities in the media are described by a series expansion using adequately chosen basic functions. Coefficients of the functions are calculated (estimated) with a qualified LSQ inversion. The advantage of this method is that it can be used in such case where both the thicknesses and velocities vary laterally (continuously and slowly), and a solution can also be obtained when no continuous travel time curve was measured — mainly in multilayer cases — for each layer.This paper shows a possibility to use this inversion method for compressional and polarized shear waves measured independently but parallel at the same profile. The longitudinal and the transversal wave velocities are independent physical parameters of the underground from each other. Knowing the distributions of both velocities in near surface structures, it is possible to compute the Poisson ratio, which is important information for solving geotechnical and environmental tasks. The paper shows the results of a field experiment.
Starting Page	215
Ending Page	228
Page Count	14
File Format	PDF
ISSN	12178977
Journal	Acta Geodaetica et Geophysica Hungarica
Volume Number	40
Issue Number	2
e-ISSN	15871037
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-02-27
Publisher Institution	Quarterly of the Hungarian Academy of Sciences
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	P-wave inversion SA-wave seismics Geophysics/Geodesy travel time
Content Type	Text
Resource Type	Article
Subject	Building and Construction Geology Geophysics

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