Seismic Waves And Sources


Seismic Waves And Sources
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Seismic Waves And Sources


Seismic Waves And Sources
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Author : A. Ben-Menahem
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Seismic Waves And Sources written by A. Ben-Menahem and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.


Earthquakes come and go as they please, leaving behind them trails of destruc tion and casualties. Although their occurrence is little affected by what we do or think, it is the task of earth scientists to keep studying them from all possible angles until ways and means are found to divert, forecast, and eventually control them. In ancient times people were awestruck by singular geophysical events, which were attributed to supernatural powers. It was recognized only in 1760 that earthquakes originated within the earth. A hundred years later, first systematic attempts were made to apply physical principles to study them. During the next century scientists accumulated knowledge about the effects of earthquakes, their geographic patterns, the waves emitted by them, and the internal constitution of the earth. During the past 20 years, seismology has made a tremendous progress, mainly because of the advent of modern computers and improvements in data acquisi tion systems, which are now capable of digital and analog recording of ground motion over a frequency range of five orders of magnitude. These technologic developments have enabled seismologists to make measurements with far greater precision and sophistication than was previously possible. Advanced computational analyses have been applied to high-quality data and elaborate theoretical models have been devised to interpret them. As a result, far reaching advances in our knowledge of the earth's structure and the nature of earthquake sources have occurred.



Seismic Waves And Sources


Seismic Waves And Sources
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Author : Ari Ben-Menahem
language : en
Publisher:
Release Date : 2000

Seismic Waves And Sources written by Ari Ben-Menahem and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Seismic waves categories.




Seismology Body Waves And Sources


Seismology Body Waves And Sources
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Author : Bruce Bolt
language : en
Publisher: Elsevier
Release Date : 2012-12-02

Seismology Body Waves And Sources written by Bruce Bolt and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Nature categories.


Methods in Computational Physics, Volume 12: Seismology: Body Waves and Sources is a six-chapter text that covers the numerical solution of some major problems on seismic body wave propagation and generation in the Earth. Chapter 1 considers the power of the computer to trace out detailed seismic response by means of ray theory, based from the results gathered in Soviet Union and the Continent. Chapter 2 exposes the finite difference methods employed to obtain complete theoretical seismograms for a source in a layered half-space, in wedges, and in a sphere, along with an outline of normal mode solutions for a source in a sphere and the ray expansion method. Chapter 3 discusses the theory and method of solution of the signals diffracted by the Earth's core using the response integral, the differential equations, and boundary conditions. This chapter deals also with the method of finding numerically the reflection coefficient in an inhomogeneous model. Chapter 4 describes a method for finding seismic velocity distributions that fit a given set of data and having found such distributions how to quantitatively assess their degree of uncertainty, such as their uniqueness. Chapter 5 surveys the theory of an observational technique for studying earthquake mechanism, while Chapter 6 provides a summary of theories of seismology and the important computational techniques together with some of their applications to seismic-source studies. This book will be greatly appreciated by geoscientists, physicists, and mathematicians.



Seismic Wave Propagation And Scattering In The Heterogeneous Earth Second Edition


Seismic Wave Propagation And Scattering In The Heterogeneous Earth Second Edition
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Author : Haruo Sato
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-03-08

Seismic Wave Propagation And Scattering In The Heterogeneous Earth Second Edition written by Haruo Sato and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-03-08 with Science categories.


Seismic waves - generated both by natural earthquakes and by man-made sources - have produced an enormous amount of information about the Earth's interior. In classical seismology, the Earth is modeled as a sequence of uniform horizontal layers (or spherical shells) having different elastic properties and one determines these properties from travel times and dispersion of seismic waves. The Earth, however, is not made of horizontally uniform layers, and classic seismic methods can take large-scale inhomogeneities into account. Smaller-scale irregularities, on the other hand, require other methods. Observations of continuous wave trains that follow classic direct S waves, known as coda waves, have shown that there are heterogeneities of random size scattered randomly throughout the layers of the classic seismic model. This book focuses on recent developments in the area of seismic wave propagation and scattering through the randomly heterogeneous structure of the Earth, with emphasis on the lithosphere. The presentation combines information from many sources to present a coherent introduction to the theory of scattering in acoustic and elastic materials and includes analyses of observations using the theoretical methods developed. The second edition especially includes new observational facts such as the spatial variation of medium inhomogeneities and the temporal change in scattering characteristics and recent theoretical developments in the envelope synthesis in random media for the last ten years. Mathematics is thoroughly rewritten for improving the readability. Written for advanced undergraduates or beginning graduate students of geophysics or planetary sciences, this book should also be of interest to civil engineers, seismologists, acoustical engineers, and others interested in wave propagation through inhomogeneous elastic media.



Seismic Wave Propagation And Scattering In The Heterogenous Earth


Seismic Wave Propagation And Scattering In The Heterogenous Earth
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Author : Haruo Sato
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-12-17

Seismic Wave Propagation And Scattering In The Heterogenous Earth written by Haruo Sato and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-12-17 with Science categories.


Seismic waves – generated both by natural earthquakes and by man-made sources – have produced an enormous amount of information about the Earth's interior. In classical seismology, the Earth is modeled as a sequence of uniform horizontal layers (or sperical shells) having different elastic properties and one determines these properties from travel times and dispersion of seismic waves. The Earth, however, is not made of horizontally uniform layers, and classic seismic methods can take large-scale inhomogeneities into account. Smaller-scale irregularities, on the other hand, require other methods. Observations of continuous wave trains that follow classic direct S waves, known as coda waves, have shown that there are heterogeneities of random size scattered randomly throughout the layers of the classic seismic model. This book focuses on recent developments in the area of seismic wave propagation and scattering through the randomly heterogeneous structure of the Earth, with emphasis on the lithosphere. The presentation combines information from many sources to present a coherent introduction to the theory of scattering in acoustic and elastic materials and includes analyses of observations using the theoretical methods developed.



Seismic Wave Propagation In The Earth


Seismic Wave Propagation In The Earth
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Author : A. Hanyga
language : en
Publisher: Elsevier
Release Date : 2016-07-29

Seismic Wave Propagation In The Earth written by A. Hanyga and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-07-29 with Science categories.


This volume contains an extensive presentation of the theory, phenomenology and interpretation of seismic waves produced by natural and artificial sources. Each theoretical topic discussed in the book is presented in a self-contained and mathematically rigorous form, yet without excessive demands on the reader's mathematical background. It is the only book to include such a complete presentation of the mathematical background and modern developments of the WKBJ theory of seismic waves, and detailed discussions of its wide ranging applications. The book will therefore be useful to postgraduate students and research workers specialising in seismic wave theory, theoretical seismology, electromagnetic wave theory and other fields of wave propagation theory.



Seismic Waves In Laterally Inhomogeneous Media


Seismic Waves In Laterally Inhomogeneous Media
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Author : Ivan Psencik
language : en
Publisher: Birkhäuser
Release Date : 2012-12-06

Seismic Waves In Laterally Inhomogeneous Media written by Ivan Psencik and has been published by Birkhäuser this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.


The special issue contains contributions presented at the international workshop Seismic waves in laterally inhomo- geneous media IV, which was held at the Castle of Trest, Czech Republic, May 22-27, 1995. The workshop, which was attended by about 100 seismologists from more than 10 countries, was devoted mainly to the current state of theoretical and computational means of study of seismic wave propagation in complex structures. The special issue can be of interest for theoretical, global and explorational seismologists. The first part contains papers dealing with the study and the use of various methods of solving forward and inverse problems in complicated structures. Among other methods, discrete-wave number method, the finite-difference method, the edge-wave supperposition method and the ray method are studied and used. Most papers contained in the second part are related to the ray method. The most important topics are two-point ray tracing, grid calculations of travel times and amplitudes and seismic wave propagation in anisotropic media.



Seismic Wave Radiation From Sources Moving Over A Finite Distance


Seismic Wave Radiation From Sources Moving Over A Finite Distance
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Author : Stanford University. Department of Aeronautics and Astronautics
language : en
Publisher:
Release Date : 1966

Seismic Wave Radiation From Sources Moving Over A Finite Distance written by Stanford University. Department of Aeronautics and Astronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Seismic waves categories.


A method was developed for solving transient moving point source problems for infinite and semi-infinite elastic media. The method makes use of integral transform techniques and Cagniard's method of inversion. Emphasis was placed on the study of primary wave and surface wave radiation from distributed sources used in exploration seismology.



Seismic Wave Propagation In Stratified Media


Seismic Wave Propagation In Stratified Media
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Author : Brian Leslie Norman Kennett
language : en
Publisher:
Release Date : 1983

Seismic Wave Propagation In Stratified Media written by Brian Leslie Norman Kennett and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Science categories.


The success of this book stems from its clear and concise, yet detailed summary of the advances in seismic source studies during the past two decades. Dr Kennett presents a mainly theoretical account of the passage of seismic waves from source to receiver, linking the theoretical development to the nature of seismograms observed across a wide range of distance scales - from a few kilometres, as in shallow reflection work for geophysical prospecting, to many thousands of kilometres for earthquakes. A unified framework is presented for all classes of seismic phenomena, for both body waves and surface waves. Each topic is taken up systematically, including many topics not normally covered in discussion of propagator theory, such as source representation theory, generalised ray theory, and the calculation of complete theoretical seismograms including all wave effects arising from the presence of the Earth's surface.



Anatomy Of Seismograms


Anatomy Of Seismograms
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Author : O. Kulhánek
language : en
Publisher: Elsevier
Release Date : 2012-12-02

Anatomy Of Seismograms written by O. Kulhánek and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Science categories.


Frequent updating of existing interpretation codes and routines is a prerequisite for modern seismogram interpretation and research. The primary goal of this book is to present in a rather tutorial form all the necessary information and techniques pertinent to essential seismogram interpretation. The treatment is descriptive rather then mathematical, and emphasis is placed on practical aspects, especially for the benefit of students and junior seismogram interpreters affiliated to seismographic stations and observatories. Those workers more knowledgeable in seismology, and curious enough in the detailed deciphering of seismogram peculiarities, will also find the presentation useful. The book is divided into two parts: a verbal description (Chapters 1-6) and a collection of 55 plates (Chapter 7) with interpretations. The verbal description explains in a rather elementary form the most fundamental physical phenomena relevant to seismogram appearance. The collection of plates exhibits a large variety of seismogram examples, and the corresponding interpretations cover different seismic sources (tectonic and volcanic earthquakes, underground explosions, cavity collapse, sonic booms), wave types, epicentral distances, focal depths and recording instruments (analog, digital, short- and long-period, broad band). The book compliments older manuals in that both analog and digital records are considered. Seismograms from more traditional narrow-band as well as from modern, broad-band instruments are displayed. Tectonic and volcanic earthquakes are represented, and the exhibited seismograms form a worldwide collection of records acquired from seismographic stations located in North and Central America, Asia, Europe and New Zealand, i.e. in various geological and tectonic environments. Terminology and usage of definition does vary among agencies in different parts of the world; that used in this book is common to Europe.