To simulate the attenuation behaviors of seismic waves, we develop a pseudo-spectral time-domain (PSTD) method to solve a CQ viscoacoustic wave equation. This method is nearly fourth-order accurate in time. Com
We found that the FD solutions using three SLS relaxation mechanisms as well as a single SLS mechanism, with properly chosen relaxation times, are quite accurate for both weak and strong attenuation. Although the RMS errors of FD simulations using a single relaxation mechanism increase with ...
AttenuationModellingSeismicWaveConstant Q, also called frequency-independent Q, is a phenomenological assumption\noften used in practice for dissipative wave propagation in both forward and\ninverse seismic modelling. A constant Q dissipative model generally results in a temporal\nconvolution-type wave ...
attenuationWavepropagationWe derive a time-domain differential equation for modelling seismic wave propagation in constant-Q viscoelastic media based on fractional spatial derivatives, specifically Laplacian differential operators of fractional order. The stress鈥搒train relation is derived from the classical ...
AttenuationWe present a new modeling approach for wave propagation in anelastic media, based on a fractional spatial differential operator. The problem is solved with the Fourier pseudo-spectral method in the spatial domain and the REM (rapid expansion method) in the time domain, which, unlike ...
The propagation of seismic waves within the near-surface weathering layers, characterized by their low-quality factors ( Q ), is often accompanied by strong attenuation and dispersion phenomena. Among these, the Rayleigh wave, with its sensitivity to dispersion, has proven to be a powerful tool ...
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