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Type: Journal article
Title: Rapid 3-D earthquake location using a hybrid global-local inversion approach
Author: Bai, C.-.Y.
Zhao, R.
Greenhalgh, S.
Citation: Pure and Applied Geophysics, 2010; 167(11):1377-1387
Publisher: Birkhauser Verlag Ag
Issue Date: 2010
ISSN: 0033-4553
Statement of
Chao-ying Bai, Rui Zhao and Stewart Greenhalgh
Abstract: A novel hybrid approach to earthquake location is proposed which uses a combined coarse global search and fine local inversion with a minimum search routine. The method exploits the advantages of network ray tracing and robust formulation of the Fréchet derivatives to simultaneously update all sampled initial source parameters in the solution space to determine the best solution. Synthetic examples, involving a three-dimensional (3-D) complex velocity model and a challenging source–receiver layout, are used to demonstrate the advantages over direct grid search algorithms in terms of solution accuracy, computational efficiency, and sensitivity to noise. Therefore, this is a promising scheme for earthquake early warning, tsunami early warning, rapid hazard assessment, and emergency response after strong earthquake occurrence.
Keywords: 3-D complex velocity model; network ray tracing; matrix inversion; earthquake location; RMS error space inspection
Rights: © 2010 Birkhauser / Springer Basel AG
RMID: 0030006907
DOI: 10.1007/s00024-010-0102-4
Appears in Collections:Physics publications

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