The Estimation of Density, P-Wave, and S-Wave Speeds of the Top-Most Layers of Sediments
Reflection arrivals from the water bottom are analysed and estimates of the elastic parameters in the top-most layers of sediments are calculated. The amplitude of the reflection coefficient from an interface is a function of the angle of incidence of the incoming source energy at the reflecting interface, and the contrasts in the density, and P- and S-wave speeds across the interface. A nonlinear parametric inversion has been developed to yield estimates of these elastic parameters from the amplitude offset information contained in pre-critical reflections. The inversion method is applied to synthetic data and also to data from the Cascadia Basin.
KeywordsElastic Parameter Synthetic Seismogram Geometrical Spreading Direct Arrival Reflection Amplitude
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