Comparison of synthetic seismograms calculated by QI approximations of the coupling ray theory with the Chebyshev spectral method

Ivan Psencik, Ekkehart Tessmer

Summary

The quasi-isotropic (QI) approximation of the coupling ray theory is numerically compared with the Chebyshev spectral method. Synthetic seismograms of qS waves propagating in a model of vertically inhomogeneous weakly transversely isotropic medium with horizontal axis of symmetry are compared. Synthetics are calculated for directions, in which the phase velocities of the two qS waves differ as well as for directions, in which they coincide (kiss singularity).

Keywords

Weak anisotropy, qS waves, QI approximation, coupling ray theory, Chebyshev spectral method

Whole paper

The image of the paper in GIF 150dpi (298 kB) is designed for an instant screen preview.

The paper is available in PostScript (1 011 kB!) and GZIPped PostScript (315 kB).

In: Seismic Waves in Complex 3-D Structures, Report 14, pp. 99-105, Dep. Geophys., Charles Univ., Prague, 2004.
SW3D - main page of consortium Seismic Waves in Complex 3-D Structures .