Accession Number:
ADA023175
Title:
Application of Advanced Methods for Identification and Detection of Nuclear Explosions from the Asian Continent
Descriptive Note:
Semi-annual technical rept.
Corporate Author:
SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
Personal Author(s):
Report Date:
1975-12-01
Pagination or Media Count:
162.0
Abstract:
The objective of this research program is to develop an optimum multi-discriminantdetection procedure for earthquake and underground explosions with emphasis on events occurring within the Asian continent. The approach to the seismic discrimination problem incorporates a number of diverse topics including explosion and earthquake source modeling stress wave propagation through realistic earth structures and prediction of teleseismically recorded ground motion the development of signal detection, enhancement and identification techniques multidiscriminant testing of a large population of worldwide events. One of the most significant achievements described in this report is the development of a three-dimensional finite difference stick-slip earthquake model and the characterization of the far-field that which propagates to teleseismic distances radiation of stress waves generated by this source. A theoretical analysis of the influence of tectonic release on the teleseismic short-period P-wave signature from underground nuclear explosions was also conducted. The principal result of this study is that in the case of most, if not all, explosions, tectonic release does not measurably affect the short-period P-wave signature.
Descriptors:
- *EARTHQUAKES
- *NUCLEAR EXPLOSIONS
- *SEISMIC DETECTION
- ASIA
- COMPUTATIONS
- COMPUTER PROGRAMS
- DATA PROCESSING
- DISCRIMINATION
- ELECTRIC FILTERS
- FAR FIELD
- FINITE DIFFERENCE THEORY
- FREQUENCY
- GROUND MOTION
- IDENTIFICATION
- MACHINE CODING
- MATHEMATICAL MODELS
- METHODOLOGY
- NARROWBAND
- PROPAGATION
- SEISMIC DATA
- SEISMIC SIGNATURES
- SEISMIC WAVES
- STRESS WAVES
- TECTONICS
- THREE DIMENSIONAL
- TIME SERIES ANALYSIS
- UNDERGROUND EXPLOSIONS
Subject Categories:
- Seismology
- Seismic Detection and Detectors