Record details

Title
    First-order reflection/transmission coefficients for unconverted plane P waves in weakly anisotropic media
Author
    Farra, V.
    Pšenčík, Ivan
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Geophysical Journal International
Vol./nr.
    Roč. 183, č. 3
Pages
    s. 1443-1454
Year
    2010
Notes
    Projekt: GA205/08/0332, GA ČR3cav_un_auth*0240426
    Rozsah: 12 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    body waves
    seismic anisotropy
    wave propagation
Keyword
    Anisotropic
    Coefficients
    First-order
    Media
    Plane
    Reflection/transmission
    Unconverted
    Waves
    Weakly
Abstract (in english)
   We present approximate formulae for the plane-wave displacement reflection/transmission (R/T) coefficients for interfaces of arbitrary contrast, separating two homogeneous, weakly anisotropic media. They result from boundary conditions requiring continuity of displacement vector and traction, in which coupled S waves are considered as a single S wave and exact quantities are replaced by first-order quantities used in first-order ray tracing. Specifically, the phase velocities, slowness and polarization vectors of P and coupled S waves appearing in the boundary conditions are of the first-order with respect to the deviations of anisotropy from isotropy. Application of the derived R/T coefficients transforms the amplitude of an incident P wave into amplitudes of reflected/transmitted P or coupled S waves.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013