Accession Number : ADP204446

Title :   A Dynamic Linear Model for Three-Component Seismic Waveforms,

Corporate Author : BATTELLE PACIFIC NORTHWEST LABS RICHLAND WA

Personal Author(s) : Daly, Don S. ; Anderson, Kevin ; Rohay, Alan ; Nicholson, Wes

PDF Url : ADP204446

Report Date : 14 AUG 1995

Pagination or Media Count : 9

Abstract : A three-component waveform is modeled as a sum of trigonometric functions using Dynamic Linear Modeling (DLM), a statistical extension of Kalman filtering. The DLM method converts a waveform into a multivariate time series of amplitude and phase-angle estimates. This time series is then transformed into a multivariate time series of descriptive features such as magnitude, direction-of-travel and dimensionality which are more closely related to the underlying seismic phases. There are many possible transformations, and several are considered here. This paper also explores the expected behavior of the dimensionality, magnitude and direction-of-travel time series over the duration of a phase. Dynamic Linear Modeling and parameter transformation is illustrated with an artificial waveform having compressional and Rayleigh phases.

Descriptors :   *SEISMIC DETECTION, *SEISMIC WAVES, *NUCLEAR EXPLOSION DETECTION, MATHEMATICAL MODELS, SYMPOSIA, STOCHASTIC PROCESSES, MONITORING, MULTIVARIATE ANALYSIS, WAVEFORMS, KALMAN FILTERING, EIGENVALUES, NUCLEAR EXPLOSION TESTING, ARMS CONTROL, SEISMIC DISCRIMINATION, TREATIES, ANGLE OF INCIDENCE, TRAVEL TIME, RAYLEIGH WAVES.

Subject Categories : Seismology
      Seismic Detection and Detectors
      Nuclear Weapons
      Government and Political Science

Distribution Statement : APPROVED FOR PUBLIC RELEASE