Relative Waveform Inversion

Abstract

A relative waveform inversion method has been developed which determines models that correctly predict waveform changes in a set of observed seismograms. By modeling changes in waveforms rather than absolute waveforms, a number of relatively poorly determined quantities, such as receiver function and Q, may be eliminated from the problem and greater resolution of key model parameters obtained. The method has been applied to the estimation of overall amplitude, pP amplitude and pP delay time for a suite of seven presumed underground nuclear explosions in the Eastern Kazakh region. Events divide into two populations based on pP amplitude, with events having small pP amplitude possibly showing indications of azimuthal variation in pP. The existence of events with radically different pP amplitudes suggest that biases may exist in current relative yield estimation techniques, an effect which is corrected for in the relative waveform method.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1981
Accession Number
ADA110183

Entities

People

  • G. R. Mellman
  • S. K. Kaufman

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Amplitude
  • Attenuation
  • Convergence
  • Data Analysis
  • Data Sets
  • Databases
  • Equations
  • Explosions
  • Far Field
  • Frequency
  • Frequency Bands
  • Materials
  • Nuclear Explosions
  • Transfer Functions
  • Travel Time
  • Waveforms
  • Waves

Readers

  • Regression Analysis.
  • Seismology