Waves and Rays in Elastic Continua - Tapa dura

The treatment is modern, but the mathematics is presented in a classical style, readable by geophysicists. Slawinski's inclusion of issues related to anisotropy is a must for any modern book on the subject. The text provides a modern mathematical physics context for seismic wave and ray theory, acting as a bridge between the disciplines of mathematical physics and geophysics that will benefit anyone interested in these topics. -- The Leading Edge "The Leading Edge" Particularly useful are the sets of exercises with complete solutions at the end of each chapter which illustrate important calculations, methods and proofs of theorems. This book touches on several important classical areas of physics and applied mathematics and provides an excellent introduction both to them and to the theory of waves in a geophysical context and is strongly recommended. -- Contemporary Physics "Contemporary Physics"

The present book - which is the second, and significantly extended, edition of the textbook originally published by Elsevier Science - emphasizes the interdependence of mathematical formulation and physical meaning in the description of seismic phenomena. Herein, we use aspects of continuum mechanics, wave theory and ray theory to explain phenomena resulting from the propagation of seismic waves.The book is divided into three main sections: Elastic Continua, Waves and Rays and Variational Formulation of Rays. There is also a fourth part, which consists of appendices.In Elastic Continua, we use continuum mechanics to describe the material through which seismic waves propagate, and to formulate a system of equations to study the behaviour of such a material. In Waves and Rays, we use these equations to identify the types of body waves propagating in elastic continua as well as to express their velocities and displacements in terms of the properties of these continua. To solve the equations of motion in anisotropic inhomogeneous continua, we invoke the concept of a ray. In Variational Formulation of Rays, we show that, in elastic continua, a ray is tantamount to a trajectory along which a seismic signal propagates in accordance with the variational principle of stationary traveltime. Consequently, many seismic problems in elastic continua can be conveniently formulated and solved using the calculus of variations. In the Appendices, we describe two mathematical concepts that are used in the book; namely, homogeneity of a function and Legendre's transformation. This section also contains a list of symbols.