Shear-wave singularities of wave propagation in anisotropic media
Item
Title (Dublin Core)
en-US
Shear-wave singularities of wave propagation in anisotropic media
Description (Dublin Core)
en-US
Shear-wave singularities in systems of anisotropic symmetry are comparatively well known, but it has not been generally realised that they may cause anomalies in shear-wave propagation for neighbouring directions due to the behaviour of the polarizations. Singularities are places where the two shear-wave slowness surfaces are continuous with each other through common points. The most frequent type, a point singularity, is a place where the two surfaces are continuous with each other through the vertices of cone-shaped projections from the surfaces. For directions of propagation in a plane, which cuts the slowness surfaces near a singularity, the velocities of the two shear-waves approach each other in a pinch and at the pinch exchange polarizations and velocity gradients. These singularities do not cause anomalies in plane waves propagating in a uniform medium, but may cause mode conversion and pulse-shape modification to waves with spherical wave-fronts, and to rays of shear-waves, in varying anisotropic media.
ARK: https://n2t.net/ark:/88439/y021254
Permalink: https://geophysicsjournal.com/article/151
ARK: https://n2t.net/ark:/88439/y021254
Permalink: https://geophysicsjournal.com/article/151
Creator (Dublin Core)
Crampin, S.
Yedlin, M.
Subject (Dublin Core)
en-US
Shear-wave singularities
en-US
Point-, kiss-, and intersection-singularities
en-US
Pinches
en-US
Anisotropic shear-waves
en-US
Shear-wave polarizations
en-US
Seismology
Publisher (Dublin Core)
en-US
Journal of Geophysics
Date (Dublin Core)
1981-01-22
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Peer-reviewed Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/151
Source (Dublin Core)
en-US
Journal of Geophysics; Vol 49 No 1 (1981): Journal of Geophysics; 43-46
2643-2986
2643-9271
Language (Dublin Core)
eng
Relation (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/151/111