Integrated Seismic Event Detection and Location by Advanced Array Processing

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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 ... continued below

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PDF-file: 95 pages; size: 6.3 Mbytes

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Kvaerna, T; Gibbons, S J; Ringdal, F & Harris, D B February 9, 2007.

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Description

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.

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PDF-file: 95 pages; size: 6.3 Mbytes

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  • Report No.: UCRL-SR-228092
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/902233 | External Link
  • Office of Scientific & Technical Information Report Number: 902233
  • Archival Resource Key: ark:/67531/metadc886986

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  • February 9, 2007

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 29, 2016, 4 p.m.

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Kvaerna, T; Gibbons, S J; Ringdal, F & Harris, D B. Integrated Seismic Event Detection and Location by Advanced Array Processing, report, February 9, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc886986/: accessed July 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.