Full text loading...
-
Numerical Simulation of the Rayleigh Window at the Ocean Bottom
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 8th International Congress of the Brazilian Geophysical Society, Sep 2003, cp-168-00106
Abstract
The Rayleigh window is a minimum in the P-wave reflection coefficient of fluid-solid interfaces, such as the ocean bottom. The phenomenon, which occurs beyond the P-wave critical angle, has been observed in the laboratory, and can be explained by using an anelastic model of the solid. For the purpose of simulating the Rayleigh window, we further develop and test the pseudospectral modeling algorithm for wave propagation at fluid-anelastic solid interfaces. The method is based on a domain-decomposition technique - one grid for the fluid part and another grid for the solid part - and the Fourier and Chebyshev differential operators. A wavenumber-frequency domain AVA method is used to compute the reflection coefficient and phase angle from the synthetic seismograms. This is the first numerical simulation of the Rayleigh window.