Polarization rotation upon reflection of direct shear waves in purely isotropic media

2006 ◽  
Author(s):  
Eric S. Lyons ◽  
Jason E. Gumble ◽  
Robert H. Tatham
Keyword(s):  
Shear Waves ◽  
Direct Shear ◽  
Polarization Rotation ◽  
Isotropic Media

Investigation of mantle kinematics beneath the Hellenic-subduction zone with teleseismic direct shear waves

2016 ◽  
Vol 261 ◽  
pp. 141-151 ◽  
Author(s):  
Judith M. Confal ◽  
Tuna Eken ◽  
Frederik Tilmann ◽  
Seda Yolsal-Çevikbilen ◽  
Yeşim Çubuk-Sabuncu ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Shear Waves ◽  
Direct Shear ◽  
Hellenic Subduction Zone

Cylindrical and Spherical Shear Waves in Nonhomogeneous Isotropic Viscoelastic Media

1973 ◽  
Vol 51 (10) ◽  
pp. 1091-1097 ◽  
Author(s):  
T. Bryant Moodie
Keyword(s):  
Equations Of Motion ◽  
Shear Waves ◽  
Three Dimensions ◽  
Radial Coordinate ◽  
Shear Stresses ◽  
Progressive Wave ◽  
Elastic Solids ◽  
Linearized Equations ◽  
Viscoelastic Media ◽  
Isotropic Media

This paper is concerned with the propagation of viscoelastic shear waves in nonhomogeneous isotropic media. Herein we develop formal methods of solving the linearized equations of viscoelastodynamics in two and three dimensions for nonhomogeneous Maxwell solids whose properties depend continuously on a single radial coordinate. These methods are developed for the linearized equations of motion formulated in terms of shear stresses, and are based on Cooper's and Reiss' extension to linear homogeneous viscoelastic media of the Karal–Keller technique. Shearing stesses are applied to the boundaries of cylindrical and spherical openings in the viscoelastic media, and formal asymptotic wave front expansions of the solutions are obtained. In both cases a modulated progressive wave that propagates with variable velocity is obtained. The modulation depends on the moduli of rigidity and viscosity, whereas the velocity depends only on the modulus of rigidity. When the viscosity parameter in our Maxwell element tends to infinity, the results reduce to the known results for nonhomogeneous elastic solids.

Shear waves in acoustic transversely isotropic media

2004 ◽  
Author(s):  
Vladimir Grechka ◽  
Linbin Zhang ◽  
James W. Rector
Keyword(s):  
Shear Waves ◽  
Transversely Isotropic ◽  
Transversely Isotropic Media ◽  
Isotropic Media

Shear‐wave vibrator signals in transversely isotropic shale

Geophysics ◽  
1985 ◽  
Vol 50 (8) ◽  
pp. 1285-1293 ◽  
Author(s):  
Sheila Peacock ◽  
Stuart Crampin
Keyword(s):  
Shear Wave ◽  
Shear Waves ◽  
Transversely Isotropic ◽  
Synthetic Seismograms ◽  
Wave Polarization ◽  
Transversely Isotropic Media ◽  
Wave Splitting ◽  
Isotropic Media ◽  
Component Field ◽  
Theoretical Results

The experiments of Robertson and Corrigan (1983) on shale are among the first three‐component field observations of shear waves in transversely isotropic media to be published. Their data are reprocessed to highlight the effects of the shale’s anisotropy on shear waves. Two results emerge. First, shear‐wave splitting in a transversely isotropic substrate is most easily observed when the vibrator baseplate is oriented so that both SH‐ and SV‐waves reach the geophone. Second, the SV‐wave polarization deviates significantly from perpendicular to the raypath. Both results may significantly affect the interpretation. Both are found to agree with theoretical results and are modeled successfully by synthetic seismograms.

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