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

Noe, S.; Yuan, S.; Montagner, J.-P. und Igel, H. (2022): Anisotropic elastic parameter estimation from multicomponent ground-motion observations: a theoretical study. In: Geophysical Journal International, Bd. 229, Nr. 2: S. 1462-1473

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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• ISSN: 0956-540X
• Sprache: Englisch