Integrated Seismic Event Detection and Location by Advanced Array Processing | |
Kvaerna, T ; Gibbons, S J ; Ringdal, F ; Harris, D B | |
Lawrence Livermore National Laboratory | |
关键词: Detection; Approximations; 58 Geosciences; Seismic Events; Processing; | |
DOI : 10.2172/902233 RP-ID : UCRL-SR-228092 RP-ID : W-7405-ENG-48 RP-ID : 902233 |
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美国|英语 | |
来源: UNT Digital Library | |
【 摘 要 】
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.
【 预 览 】
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902233.pdf | 6408KB | download |