Accession Number:

ADA171029

Title:

Deterministic Methods of Seismic Source Identification

Descriptive Note:

Annual technical rept. 30 Sep 1983-1 Oct 1984

Corporate Author:

COOPERATIVE INST FOR RESEARCH IN ENVIRONMENTAL SCIENCE BOULDER CO

Personal Author(s):

• Archambeau, Charles B.

Report Date:

1984-11-01

Pagination or Media Count:

145.0

Abstract:

The objectives were to 1 Develop and test methods of discrimination in the regional and teleseismic distance range using physical source parameter discriminants, Pursue theoretical and observational studies of seismic sources 3 develop methods of theoretical seismogram synthesis in the near, regional and teleseismic distance ranges for structure and source definition 4 Develop and apply advanced signal processinganalysis methods for discrimination and explosion yields estimation studies and 5 Pursue near field studies of explosions and earthquakes for detailed source definition. This report describes specific research results pertaining to 1 The theoretical basis for automatic seismic signal detection and analysis, and 2 Analytical methods for the representation of seismic radiation fields in uniformly layered elasticanelastic media. This modal method provides predictions of both body and surface waves in the frequency range from 0 to about 15 HZ at near and regional distances from seismic sources. This latter exposition is intended to be comprehensive and integrates new and old results and methods. The modal representation method for seismic radiation fields is being employed to describe radiation fields for the prediction of earthquake and explosion radiation fields and has been used to evaluate a variety of detection and discrimination methods.

Descriptors:

• *DISCRIMINATION
• *SEISMIC SIGNATURES
• EARTHQUAKES
• FOURIER ANALYSIS
• SEISMIC DETECTION
• SEISMOLOGY
• TIME SERIES ANALYSIS
• UNDERGROUND EXPLOSIONS

Subject Categories:

• Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE