Record details

Title
    Two-point paraxial traveltimes in an inhomogeneous anisotropic medium
Author
    Červený, V.
    Iversen, E.
    Pšenčík, Ivan
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Geophysical Journal International
Vol./nr.
    Roč. 189, č. 3
Pages
    s. 1597-1610
Year
    2012
Notes
    Projekt: GAP210/11/0117, GA ČR, CZ3cav_un_auth*0273502
    Rozsah: 14 s. : P
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    body waves
    seismic anisotropy
    theoretical seismology
    wave propagation
Keyword
    Anisotropic
    Inhomogeneous
    Medium
    Paraxial
    Traveltimes
    Two-point
Abstract (in english)
   We derive formulae for the approximate computation of two-point paraxial traveltimes (traveltimes between two points) for points arbitrarily chosen in a paraxial vicinity of a reference ray computed in a smoothly varying inhomogeneous anisotropic medium containing structural interfaces. The formulae have a form of the Taylor expansion in Cartesian coordinates of the two-point paraxial traveltime or its square to the quadratic terms. The coefficients of the expansion depend on quantities obtained by ray tracing in Cartesian coordinates and by dynamic ray tracing in ray-centred coordinates. Alternatively, the dynamic ray tracing can be performed in Cartesian coordinates. The advantages of the approach based on dynamic ray tracing in raycentred coordinates are its efficiency and elimination of possible complications that may arise from the redundant fundamental solutions of dynamic ray tracing in Cartesian coordinates (the ray-tangent and non-eikonal solutions).
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013