Analysis of Regional Phases Using Three Component Data

Abstract

A method is presented for computing three-dimensional seismic wave scattering from a rough interface. It is derived using a perturbation approach which requires interface height perturbations to be small relative to the wavelengths of scattered waves, and interface slope perturbations to be much less than one. These validity conditions are based on an order of error analysis of the truncation of the perturbation series. Comparison of reflection and transmission coefficients generated by the perturbation method with those generated from a second-order finite difference method for several rough interface models with Gaussian auto-correlation functions shows that the perturbation method is accurate for RMS interface height deviations of less than about a tenth of the smallest wavelength in the scattered field. This result is independent of RMS interface slope in the tested range of 0.037 to 0.99. Keywords: Scattering kernels.

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Document Details

Document Type
Technical Report
Publication Date
Nov 28, 1988
Accession Number
ADA205480

Entities

People

  • M. Nafi Toksöz
  • Michael Prange

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Classification
  • Dispersion Relations
  • Earth Sciences
  • Elastic Waves
  • Geography
  • Geology
  • Geophysics
  • Governments
  • Massachusetts
  • New York
  • Plane Waves
  • Planetary Sciences
  • Procurement
  • Security
  • Three Dimensional
  • United States

Fields of Study

  • Physics

Readers

  • Approximation Theory.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.