Propagation of Regional Phases: Observations and Theory
Abstract
In this study we present the results of investigations dealing with three topics. (1) We have continued our investigation of the influence the regular repetition of features in seismograms, introduced at the source and/or during propagation by layer resonance, has on the spectrum of the recorded coda. We have developed an automatic algorithm that discriminates mining explosions from nuclear explosions and earthquakes. (2) We consider the influence large crustal inhomogeneities, or topographic undulations, in the vicinity of receivers can have on the character of the recorded seismic coda. Specifically, we have developed a migration technique that scans the recorded coda for phases generated by local scattering interactions. (3) We have developed a regularized approach to seismic deconvolution that allows the introduction of a priori information, such as that describing the statistical nature of the additive noise and the underlying model, into the inversion process. We investigate how this algorithm can enhance the images produced by the migration algorithm developed in the previous section.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1991
- Accession Number
- ADA246891
Entities
People
- J. A. Orcutt
- M. A. Hedlin
Organizations
- Scripps Institution of Oceanography