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Anisotropic elastic parameter estimation from multicomponent ground-motion observations: a theoretical study

Abstract : We investigate the potential of multicomponent, single-point ground-motion observations (displacement, rotation and strain) to allow the estimation of near-receiver anisotropic elastic parameters. Based on full-space, plane-wave propagation analysis, we demonstrate that in (locally homogeneous) anisotropic media, the wave propagation direction and the velocities of quasi-P and quasi-S waves can-in principle-be determined from three components of displacements and three components of rotations. Mimicking the situation of a borehole setting, we formulate an inverse problem, estimating the full elastic tensor from multidirectional observations. We show that in the presence of noise it is beneficial to observe additionally a longitudinal strain component (e.g. along the borehole), further constraining the predominantly quasi-P related elastic tensor components.
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Submitted on : Friday, April 15, 2022 - 2:00:44 PM
Last modification on : Saturday, June 25, 2022 - 8:53:36 AM

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S Noe, S Yuan, J-P Montagner, H Igel. Anisotropic elastic parameter estimation from multicomponent ground-motion observations: a theoretical study. Geophysical Journal International, 2022, 229, pp.1462-1473. ⟨10.1093/gji/ggac006⟩. ⟨insu-03643019⟩

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