Accession Number:

ADA254348

Title:

Regional Seismograms: Attenuation and Scattering

Descriptive Note:

Final rept. 1 Jul 1989-31 Dec 1991

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE EARTH RESOURCES LAB

Report Date:

1992-03-06

Pagination or Media Count:

363.0

Abstract:

The objective of this study was to examine the influence of attenuation and scattering on regional high frequency seismograms. This report consists of a Ph.D. thesis, a paper, and three preprints of papers either submitted or in preparation, on work supported by this project they include both basic work on attenuation, scattering and anisotropy, and applications to regional seismograms. The Ph.D. thesis discusses the application of the finite difference method to problems in scattering and attenuation due to scattering in a random medium. In the first three chapters of the thesis, the application of Born theory to scattering and scattering attenuation is assessed. The fourth chapter to explain the observed scattering phenomena at the NORSAR and NORESS arrays in Norway. The second section is a paper that examines the radiation pattern of explosive sources in anisotropic media. The third section evaluates the problem of Lg blockage across crustal extension zones by the method of coupled modes. The fourth section is concerned with the fundamental problem of scattering of the reflected wave from a rough interface. The final section applies transport theory to Rg data from a U.S. Geological Survey experiment in Maine.

Subject Categories:

  • Seismology
  • Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE