Influence of Scattering on Seismic Waves

Abstract

Tests have been carried out to find sources of noise and velocity bias in a new array analysis method, the wavenumber spectrum, which has been used at NORESS to detect diffuse components of teleseismic coda. Noise problems have been analysed by using subarrays and identified as being due to loss of coherence between signals at sensors of given spacing as frequency increases. Velocity bias has been investigated using synthetic signals and concluded that the full array should be used in the frequency range 1-2.5 (Hz), the array less the outer ring for 2.5-5 Hz and the array less the two outer rings for 5-10 Hz, In addition, a preliminary report is given on the use of ultrasonic modeling to investigate coda. Keywords: Seismic arrays; Norway; Seismic spectra; Seismic noise; Frequency-wavenumber spectrum; Coherency.

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Document Details

Document Type
Technical Report
Publication Date
Oct 21, 1986
Accession Number
ADA179175

Entities

People

  • Anton M. Dainty
  • M. N. Toksoez

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Classification
  • Elements
  • Frequency
  • Frequency Bands
  • Geophysics
  • Mean Free Path
  • New York
  • Phase Velocity
  • Planetary Sciences
  • Scattering
  • Secondary Waves
  • Seismic Waves
  • United States
  • Waves
  • White Noise

Fields of Study

  • Engineering

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Phased Array Antenna Design.
  • Seismology

Technology Areas

  • Space
  • Space - Space Objects