Accession Number : AD0743317

Title :   Seismic Discrimination by Harmonic Analysis Techniques.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Youngblood,William Rayoul

Report Date : MAR 1972

Pagination or Media Count : 85

Abstract : A large set of short period earthquake and underground nuclear explosion teleseismic signals (recorded at LASA) were analyzed using bands of the Discrete Fourier Transform coefficients and a pattern recognition system. The earthquakes, from several regions, ranged in magnitude from 4.1 to 6.1, and included shallow and deep events. The explosions ranged in magnitude from 4.7 to 6.3, and included US, Soviet, and French shots. Best results were 88.9% of the earthquakes and 100% of the explosions correctly identified. Furthermore, when deep and unknown depth earthquakes were excluded, only one earthquake was misidentified. (Author)

Descriptors :   (*SEISMIC WAVES, IDENTIFICATION), (*NUCLEAR EXPLOSIONS, DETECTION), (*UNDERGROUND EXPLOSIONS, DETECTION), EARTHQUAKES, HARMONIC ANALYSIS, PATTERN RECOGNITION, INTEGRAL TRANSFORMS, CLASSIFICATION, THESES

Subject Categories : Seismology
      Seismic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE