
Accession Number : ADA113369
Title : Automatic Seismic Signal Processing Research.
Descriptive Note : Final rept.,
Corporate Author : SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
Personal Author(s) : Farrell,William E ; Murphy,J R ; Rodi,W L ; Archambeau,C B ; Bache,L B
PDF Url : ADA113369
Report Date : Sep 1981
Pagination or Media Count : 114
Abstract : This report describes computer programs implemented on the Seismic Data Analysis Center computer system for automatically analyzing seismograms and classifying them as being either explosionlike or earthquakelike. The principal accomplishments of this work have been (1) the development at SDAC of a library of general purpose data analysis programs, (2) the definition of an eventoriented waveform data base (3) the development of a program to measure spectral ratios, bodywave magnitude, surface wave magnitude and complexity automatically, and (4) the reanalysis of the variable frequency magnitude (VFM) data compiled during the Area of Interest (AI) experiment using linear discriminant analysis. Although successful performance of the discrimination software has been demonstrated in both an interactive and automatic mode, intensive testing and evaluation will require three further steps. The first of these is to incorporate automatic procedures for measuring timedomain m sub b and M sub s measures. The second is to expand greatly the size of the data base. The third is to process the augmented data set for all discriminants and use these as training data in a more complete linear discriminant analysis. (Author)
Descriptors : *Seismic data, *Discriminate analysis, Signal processing, Multivariate analysis, Seismographs, Mathematical filters, Narrowband, Data reduction, Automatic, Surface waves, Seismic waves, Intensity, Waveforms, Time domain, Discrimination, Earthquakes, Underground explosions, Nuclear explosions
Subject Categories : Seismic Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE