Accession Number:

AD0684172

Title:

RESEARCH IN SEISMOLOGY

Descriptive Note:

Annual technical rept. Sep 11967-Aug 1968

Corporate Author:

SAINT LOUIS UNIV MO DEPT OF GEOPHYSICS AND GEOPHYSICAL ENGINEERING

Report Date:

1968-09-01

Pagination or Media Count:

88.0

Abstract:

Research in seismology on fundamental problems related to the detection, location and identification of underground explosions is described. Work in progress pertains to studies of 1 long period P-wave amplitude anomalies at the Montana LASA, 2 determination of anomalous structure in Fennoscandia by use of first derivatives of P-wave travel times, 3 crust and mantle S-wave velocity distribution and its regional variations, 4 a new method of earthquake energy determination, 5 the effect of focal depth on the spectrum of body waves, and 6 the frequency dependence of transmission through a layer over a half-space examined by modeling seismology techniques. Completed research is summarized and has investigated 1 Love and Rayleigh wave phase velocities over U. S. continental paths, 2 decoupling and source function for explosions in a three-dimensional model, and 3 exact solutions for the displacement components in head waves due to an impulsive double couple source.

Subject Categories:

  • Seismology
  • Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE