SEISMIC_WAVE_PROPAGATION.pdf
Research on two topics related to seismic nuclear monitoring and discrimination
Effect of 3-D heterogeneities and topography on seismic wave propagation and the use of empirical Green's functions for source characterizations and
discrimination as applied to seismic nuclear monitoring.
Document date: 1996-09-01
Department: Earth Resources Laboratory, MIT
Author: M. Bouchon, N. Cheng, M. Imhof, Y. Li, W. Rodi, C. Schultz, M. Toksoz
Document type: report
pages: 174
Archivist's Notes: Fair to good quality document. Form 298 page. Unclassified for unlimited public distribution.
|
Title: Effect of 3-D Heterogeneities and Topography on Seismic Wave Propagation and the Use of Empirical Green’s Functions for Source
Characterization and Discrimination.
174 page Report dated 1st September 1996 written by 7 researchers at the Earth Resources Laboratory, Department of Earth, Atmospheric and Planetary
Sciences, Massachusetts Institute of Technology. AFOSR was the sponsoring body.
Table of Contents reveals the following subjects are addressed:
-Effect of 3-D Topography on Seismic Motion
-A Fast Implementation of Boundary Integral Equation Methods to Calculate the Propagation of Seismic Waves in Laterally Varying Layered Media.
-Scattering of Acoustic and Elastic Waves Using a Hybrid Multiple Multipole Expansions-Finite Element Technique
-A Comparison of Scattering from 2-D and 3-D Rough Interface
-Source Time Functions of Nuclear Explosions and Earthquakes in Central Asia Determined Using Empirical Green’s Functions.
-Discrimination of Small Earthquakes and Explosions.
The conclusions and recommendations, found on pdf page 168 explains:
• The source time duration of M<3 earthquakes is 2 to 3 times shorter than that of explosions of similar magnitude.
• The lower frequency content of small explosions, relative to earthquakes, is partially attributable to their shallower depth.
• Recommendation is made that future work on Lg spectral discriminants be tested on a large number of events from different regions to assess their
general effectiveness.
• Recommendation is made to further numerical modeling studies aimed at determining how Lg spectra are affected by vertical layering in the crust…
|
Well frozen snowman does a pretty good job of covering this document, but just the title will be exercise for both brain and mouth.
Effect of 3-D heterogeneities and topography on seismic wave propagation and the use of empirical Green's functions for source characterizations and
discrimination as applied to seismic nuclear monitoring.
If you really want to try a tongue twister, check out the abstract on page 3. The only reason I can fathom for a description like this is that these
MIT professors were using jargon they thought would impress someone. It is clearly not written for a general audience.
This document was part of a series of related documents in the study of seismic events due to the Vela incident and the Vela Uniform Project. It was a
project to establish data collection stations in order to detect the testing of a nuclear explosion.
It is highly technical with a lot of data and antiquated computer images. This is all clearly over my head, but hopefully useful to someone.
|
