Seismic Wave Propagation Studies
Abstract
A new method of simulating seismic rays, computing travel times, and approximating amplitudes in earth models has been developed. The digital computer is used to model a spherical or a flat earth. Two- or three- dimensional models are employed. The method can be used for heterogeneous models, and includes computation of multiple reflections. Travel times have been obtained for a model of a cross-section underlying LASA. A data processing capability specifically intended for the study of the S-wave particle variations across LASA was built on this contract. Microseismic investigations in connection with JORUM indicated that the firing of a large yield underground shot did not produce any measurable tectonic release of energy in active fault regions at a distance of 60 to 100 km from the source. Travel time studies of PcP and P were used to determine the surface configuration of a portion of the earth's core. Spectral studies were made of underground nuclear shots and earthquakes recorded at teleseismic, regional and near distances. An additional study was made of the characteristics of seismic background noise recorded on the bottom of Lake Superior.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1970
- Accession Number
- AD0715316
Entities
People
- D. E. Willis
- P. L. Jackson
- R. M. Turpening
Organizations
- University of Michigan