Sensor placement for the analysis of seismic surface waves: sources of error, design criterion and array design algorithms

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Sensor placement for the analysis of seismic surface waves: sources of error, design criterion and array design algorithms

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Title: Sensor placement for the analysis of seismic surface waves: sources of error, design criterion and array design algorithms
Author: Maranò, Stefano; Fäh, Donat; Lu, Yue

Note: Order does not necessarily reflect citation order of authors.

Citation: Marano, S., D. Fah, and Y. M. Lu. 2014. “Sensor Placement for the Analysis of Seismic Surface Waves: Sources of Error, Design Criterion and Array Design Algorithms.” Geophysical Journal International 197 (3) (April 25): 1566–1581. doi:10.1093/gji/ggt489.
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Abstract: Seismic surface waves can be measured by deploying an array of seismometers on the surface of the earth. The goal of such measurement surveys is, usually, to estimate the velocity of propagation and the direction of arrival of the seismic waves. In this paper, we address the issue of sensor placement for the analysis of seismic surface waves from ambient vibration wavefields. First, we explain in detail how the array geometry affects the mean-squared estimation error (MSEE) of parameters of interest, such as the velocity and direction of propagation, both at low and high signal-to-noise ratios (SNRs). Second, we propose a cost function suitable for the design of the array geometry with particular focus on the estimation of the wavenumber of both Love and Rayleigh waves. Third, we present and compare several computational approaches to minimize the proposed cost function. Numerical experiments verify the effectiveness of our cost function and resulting array geometry designs, leading to greatly improved estimation performance in comparison to arbitrary array geometries, both at low and high SNR levels.
Published Version: doi:10.1093/gji/ggt489
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:25482688
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