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Numerical-analytical interfacing in two dimensions with applications to modeling NTS seismograms

Stead, Richard J. and Helmberger, Donald V. (1988) Numerical-analytical interfacing in two dimensions with applications to modeling NTS seismograms. Pure and Applied Geophysics, 128 (1-2). pp. 157-193. ISSN 0033-4553. doi:10.1007/BF01772596.

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A new method for interfacing numerical and integral techniques allows greater flexibility in seismic modeling. Specifically, numerical calculations in laterally varying structure are interfaced with analytic methods that enable propagation to great distances. Such modeling is important for studying situations containing localized complex regions not easily handled by analytic means. The calculations involved are entirely two-dimensional, but the use of an appropriate source in combination with a filter applied to the resulting seismograms produces synthetic seismograms which are point-source responses in three dimensions. The integral technique is called two-dimensional Kirchhoff because its form is similar to the classical three-dimensional Kirchhoff. Data from Yucca Flat at the Nevada Test Site are modeled as a demonstration of the usefulness of the new method. In this application, both local and teleseismic records are modeled simultaneously from the same model with the same finite-difference run. This application indicates the importance of locally scattered Rayleigh waves in the production of teleseismic body-wave complexity and coda.

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Additional Information:© 1988 Birkhäuser Verlag. Received 30 March 1987; Revised 08 January 1988; Accepted 11 January 1988.
Group:Seismological Laboratory
Subject Keywords:scattering; finite difference; Kirchhoff integration, NTS
Issue or Number:1-2
Record Number:CaltechAUTHORS:20190214-145049962
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Official Citation:Stead, R.J. & Helmberger, D.V. PAGEOPH (1988) 128: 157.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92946
Deposited By: Gail Peretsman Clement
Deposited On:19 Feb 2019 23:52
Last Modified:16 Nov 2021 16:54

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