Accession Number:

AD0648458

Title:

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

Descriptive Note:

Final rept. 2 Jan 1964-15 Dec 1966

Corporate Author:

RESEARCH TRIANGLE INST (RTI) RESEARCH TRIANGLE PARK NC

Personal Author(s):

Report Date:

1967-01-01

Pagination or Media Count:

115.0

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 kmsec. 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 xx 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.

Subject Categories:

  • Seismology
  • Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE