Record details

Title
    Gaussian beams in inhomogeneous anisotropic layered structures
Author
    Červený, V.
    Pšenčík, Ivan
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Geophysical Journal International
Vol./nr.
    Roč. 180, č. 2
Pages
    s. 798-812
Year
    2010
Notes
    Projekt: GA205/07/0032, GA ČR, CZ3cav_un_auth*0229817
    Projekt: GA205/08/0332, GA ČR3cav_un_auth*0240426
    Rozsah: 15 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    body waves
    seismic anisotropy
    theoretical seismology
    wave propagation
Keyword
    Anisotropic
    Beams
    Gaussian
    Inhomogeneous
    Layered
    Structures
Abstract (in english)
   Gaussian beams, approximate solutions of elastodynamic equation concentrated close to rays of high-frequency seismic body waves, propagating in inhomogeneous anisotropic layered structures, are studied. They have Gaussian amplitude distribution along any straightline profile intersecting the ray. At any point of the ray, the Gaussian distribution of amplitudes is controlled by the 2 × 2 complex-valued symmetric matrix M of the second derivatives of the traveltime field with respect to ray-centred coordinates. Matrix M can be simply determined along the ray if the ray propagator matrix is known and if the value of M is specified at a selected point of the ray. The ray propagator matrix can be calculated along the ray by solving the dynamic ray tracing system twice: once for the real-valued initial plane-wave conditions and once for the real-valued initial point-source conditions.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013