Neville G. W. Cook

TL;DR: In this paper, the authors derived the complete solutions for seismic wave reflection, conversion, and transmission across a displacement and velocity discontinuity between two half-spaces with different densities and elastic properties for all angles of the incident wave.

TL;DR: In this article, the effect of joints on seismic wave propagation is analyzed in terms of theories concerning the roughness of the two joint surfaces and their deformation under stress, and the results of laboratory measurements of seismic pulses transmitted across natural joints with different specific stiffnesses.

TL;DR: The results of a comprehensive laboratory study of the mechanical displacement, permeability, and void geometry of single rock fractures in a quartz monzonite are summarized and analyzed in this paper, where a metal-injection technique was developed that provided quantitative data on the precise geometry of the void spaces between the fracture surfaces and the areas of contact at different stresses.

TL;DR: In this article, the effects of nonwelded interfaces on seismic wave propagation are analyzed using effective moduli, in terms of which seismic wave propagates independent of frequency and without loss, unless the moduli include imaginary terms.

TL;DR: In this article, an idealized fracture consisting of two parallel plates propped open by isolated asperities is considered, and boundary element calculations, analogue electrical conductivity measurements and an effective medium approximation are used to study the permeability of fractures with circular, elliptical and irregular asperity shapes.