Accession Number:

ADA128493

Title:

Regional Discrimination with Broadband Data

Descriptive Note:

Final rept. 1 Oct 1981-30 Sep 1982

Corporate Author:

CALIFORNIA UNIV BERKELEY BERKELEY SEISMOLOGRAPHIC STATION

Personal Author(s):

Report Date:

1983-02-04

Pagination or Media Count:

140.0

Abstract:

The research supported by this grant is directed toward the general problems of detection and identification of underground explosions through the study of radiated seismic waves. Particular emphasis is on the collection and analysis of broadband seismic data at near and regional distances. Specific elements of the research program are 1 recording of broadband data from events at the Nevada Test Site 2 analysis of the coherence of ground motion near explosions and earthquakes 3 study of the relative isotropic and non- isotropic components of explosive sources through the application of moment tensor inversion techniques 4 analysis of regional surface wave data in order to obtain models for the velocity and attenuation in the crust 5 archival of near and regional data sets which are of value to the general discrimination problem. Section II describes the analysis of array data recorded 1.9 km from the explosion Liptauer in Yucca Valley fo the Nevada Test Site. Section III presents a new way of looking at frequency-wavenumber spectral estimation with array data. Section IV examines the problem that exists when the velocity structure is complicated to the extent that it can be considered to have a random component. Section V treats the problem of scattering of elastic waves by small inhomogeneities. The solution is expressed in terms of a moment tensor expansion of the properties of the scatterer.

Subject Categories:

  • Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE