High Resolution Geological Site Characterization Utilizing Ground Motion Data

Abstract

Experimentally produced surface waves at high frequencies (5-50 Hz) and short source-receiver distances (5-100 m) are utilized in the determination of shallow shear structures in geological materials. This procedure is shown to provide a high resolution picture of these shallow materials which may be of interest to the engineering and environmental community. Love waves are generated by the Sh source, SWIG, developed under this contract. Rayleigh waves are produced by the commercially available Betsy Seisgun. Group velocity determination includes multiple filter analysis with the application of narrow band Gaussian filters to the data and determination of the peaks in the resulting amplitude envelopes. Phase velocities are determined from the array data using the p-omega technique. Dispersion data is inverted to refine the velocity estimates and produce an attenuation model.... Seismology, Geological site characterization, Shear waves, Surface waves, Rayleigh Waves, Love Waves, Dispersion analysis, Velocity inversion.

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Document Details

Document Type
Technical Report
Publication Date
Jul 09, 1993
Accession Number
ADA268926

Entities

People

  • Brian W. Stump
  • Mike Craven

Organizations

  • Southern Methodist University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Data Acquisition
  • Data Analysis
  • Data Sets
  • Engineering
  • Filter Analysis
  • Filters
  • Frequency
  • Frequency Bands
  • Group Velocity
  • Love Waves
  • Measurement
  • Phase Velocity
  • Rayleigh Waves
  • Seismology
  • Wave Propagation
  • Waveforms

Readers

  • Seismology