Regional Seismic Event Identification and Improved Locations With Small Arrays
Abstract
We isolated the effect of structure immediately beneath seismic stations on seismic waveforms by determining the inference of velocity discontinuities beneath a single broadband 3-component seismic station using receiver functions, in which the P-to-S converted phases generated beneath a seismic station are isolated by deconvolution of the horizontal component seismograms by the vertical. We improve the deconvolution itself by the development of a time domain inversion for the receiver function. We extend the technique's application to an area of complex structure, using data collected at Pinon Flat Observatory, California, where we improve understanding of the region's structure and tectonic framework. We then used near-receiver- scattered component of teleseismic code to calibrate site amplifications for the southern California seismic network. We also developed and applied appropriate statistical analysis tools to permit accurate estimation of the site amplifications from the doubly censored non-Gaussian data. The main purpose of estimating site amplifications has been to enable isolation of propagation effects on Lg amplitudes, which is important to understand for accurate monitoring of nuclear testing. We conclude with the application of the site amplifications to Lg of regional events, demonstrating that they are successful in isolating propagation from site effects on Lg amplitudes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 28, 1998
- Accession Number
- ADA384119
Entities
People
- Glenn E. Baker
- Jean-bernard Minster
Organizations
- Scripps Institution of Oceanography