Crustal and Upper Mantle Velocity and Q Structures of Mainland China

Abstract

New data from the Seismological Research Observatory (SRO) is used in conjunction with a nonlinear least squares technique to invert surface wave group velocity data for the shear velocity structure of the South-China subplate. A multi-filter analysis was used to produce group velocities for the fundamental mode Love and Rayleigh wave. A number of earthquakes over a single path are used in order to deduce a measure of the observational uncertainty of the present method. Group velocity standard deviations range from .03 to .1 km/ sec for Love waves over the period range of 10 to 65 seconds. Results of the inversion indicate that a 3 layer, 40 km thick crust is an adequate model consistent with the data for the South-China subplate. Crustal shear velocities are found to be higher and upper mantle shear velocities lower than previously reported values for this region.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1978
Accession Number
ADA079658

Entities

People

  • Ta-liang Teng

Organizations

  • University of Southern California

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplitude
  • Computer Programs
  • Computers
  • Earth Models
  • Eigenvalues
  • Filtration
  • Frequency
  • Group Velocity
  • Inverse Problems
  • Iterations
  • Love Waves
  • Models
  • Phase Velocity
  • Rayleigh Waves
  • Secondary Waves
  • Surface Waves
  • Transfer Functions

Fields of Study

  • Environmental science

Readers

  • Seismology