RESEARCH DIRECTED TOWARD THE STUDY OF SEISMICITY IN THE SOUTHEASTERN UNITED STATES

Abstract

Travel-times determined from local earthquake and refraction data are presented which indicate a crustal structure of h1 = 33.0 km, h2 = 10.8 km, and an upper mantle velocity of 8.10 km/sec. Fundamental and first higher order Rayleigh group-velocity data determined by digital bandpass filtering are presented for the Southern Appalachian region. The Dunkin modification of the Thomson-Haskell matrix method is used to compute theoretical Rayleigh dispersion curves for comparison with the observed curves. The Appalachian foreland has crustal structure similar to the Gutenberg-Birch II continental model with a total thickness of 40 km. A sin x/x analysis of the Bouguer gravity data yields a total crustal thickness of about 50 km beneath the Southern Appalachians. P- residuals computed at Chapel Hill, North Carolina and McMinnville, Tennessee show a systematic deviation of as much as plus or minus 3 sec.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1967
Accession Number
AD0648458

Entities

People

  • John W. Minear

Organizations

  • RTI International

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Computational Science
  • Computer Programming
  • Computer Programs
  • Computers
  • Displacement
  • Equations
  • Group Velocity
  • Love Waves
  • North Carolina
  • Phase Velocity
  • Rayleigh Waves
  • Surface Waves
  • Tennessee
  • United States
  • Wave Propagation
  • Waves

Fields of Study

  • Geology

Readers

  • Approximation Theory.
  • Seismology