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Title: Integrated Seismic Event Detection and Location by Advanced Array Processing

Abstract

The principal objective of this two-year study is to develop and test a new advanced, automatic approach to seismic detection/location using array processing. We address a strategy to obtain significantly improved precision in the location of low-magnitude events compared with current fully-automatic approaches, combined with a low false alarm rate. We have developed and evaluated a prototype automatic system which uses as a basis regional array processing with fixed, carefully calibrated, site-specific parameters in conjuction with improved automatic phase onset time estimation. We have in parallel developed tools for Matched Field Processing for optimized detection and source-region identification of seismic signals. This narrow-band procedure aims to mitigate some of the causes of difficulty encountered using the standard array processing system, specifically complicated source-time histories of seismic events and shortcomings in the plane-wave approximation for seismic phase arrivals at regional arrays.

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
902233
Report Number(s):
UCRL-SR-228092
TRN: US200717%%498
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; ACCURACY; APPROXIMATIONS; DETECTION; PROCESSING; SEISMIC EVENTS

Citation Formats

Kvaerna, T, Gibbons, S J, Ringdal, F, and Harris, D B. Integrated Seismic Event Detection and Location by Advanced Array Processing. United States: N. p., 2007. Web. doi:10.2172/902233.
Kvaerna, T, Gibbons, S J, Ringdal, F, & Harris, D B. Integrated Seismic Event Detection and Location by Advanced Array Processing. United States. doi:10.2172/902233.
Kvaerna, T, Gibbons, S J, Ringdal, F, and Harris, D B. Fri . "Integrated Seismic Event Detection and Location by Advanced Array Processing". United States. doi:10.2172/902233. https://www.osti.gov/servlets/purl/902233.
@article{osti_902233,
title = {Integrated Seismic Event Detection and Location by Advanced Array Processing},
author = {Kvaerna, T and Gibbons, S J and Ringdal, F and Harris, D B},
abstractNote = {The principal objective of this two-year study is to develop and test a new advanced, automatic approach to seismic detection/location using array processing. We address a strategy to obtain significantly improved precision in the location of low-magnitude events compared with current fully-automatic approaches, combined with a low false alarm rate. We have developed and evaluated a prototype automatic system which uses as a basis regional array processing with fixed, carefully calibrated, site-specific parameters in conjuction with improved automatic phase onset time estimation. We have in parallel developed tools for Matched Field Processing for optimized detection and source-region identification of seismic signals. This narrow-band procedure aims to mitigate some of the causes of difficulty encountered using the standard array processing system, specifically complicated source-time histories of seismic events and shortcomings in the plane-wave approximation for seismic phase arrivals at regional arrays.},
doi = {10.2172/902233},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Feb 09 00:00:00 EST 2007},
month = {Fri Feb 09 00:00:00 EST 2007}
}

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