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Models and Methods of Magnetotellurics

Models and Methods of Magnetotellurics
Author: Mark N. Berdichevsky
Publisher: Springer Science & Business Media
Total Pages: 576
Release: 2010-07-15
Genre: Science
ISBN: 3540778144

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Magnetotellurics is finding increasing applications for imaging electrically conductive structures below the Earth`s surface - in both industrial and academic research projects. In this book the authors provide a systematic approach to understanding the modern theory of ill-posed problems which is essential to making confident meaningful interpretations of magnetotelluric and magnetovariational soundings. The interpretation is conducted in an interactive way.


The Magnetotelluric Method

The Magnetotelluric Method
Author: Alan D. Chave
Publisher: Cambridge University Press
Total Pages: 571
Release: 2012-04-26
Genre: Science
ISBN: 1107376971

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The magnetotelluric method is a technique for imaging the electrical conductivity and structure of the Earth, from the near surface down to the 410 km transition zone and beyond. This book forms the first comprehensive overview of magnetotellurics, from the salient physics and its mathematical representation to practical implementation in the field, data processing, modeling and geological interpretation. Electromagnetic induction in 1-D, 2-D and 3-D media is explored, building from first principles, and with thorough coverage of the practical techniques of time series processing, distortion, numerical modeling and inversion. The fundamental principles are illustrated with a series of case histories describing geological applications. Technical issues, instrumentation and field practices are described for both land and marine surveys. This book provides a rigorous introduction to magnetotellurics for academic researchers and advanced students, and will be of interest to industrial practitioners and geoscientists wanting to incorporate rock conductivity into their interpretations.


Practical Magnetotellurics

Practical Magnetotellurics
Author: Fiona Simpson
Publisher: Cambridge University Press
Total Pages: 276
Release: 2005-02-03
Genre: Science
ISBN: 9780521817271

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Magnetotellurics in the Context of the Theory of Ill-posed Problems

Magnetotellurics in the Context of the Theory of Ill-posed Problems
Author: Mark Naumovich Berdichevskiĭ
Publisher: SEG Books
Total Pages: 233
Release: 2002
Genre: Science
ISBN: 1560801069

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This volume serves as an introduction to modern magnetotellurics originating with the pioneering work of Tikhonov and Cagniard. It presents a comprehensive summary of theoretical and methodological aspects of magnetotellurics. It provides a bridge between textbooks on electrical prospecting and numerous papers on magnetotelluric methods scattered among various geophysical journals and collections. The book has been written in the terms of the theory of ill-posed problems and contains a special chapter encouraging readers to master the elements of this theory that defines the philosophy of the physical experiment. The book thus offers the connected and consistent account of the principles of magnetotellurics from that single viewpoint. The book also brings together developments from many sources and involves some little-known results developed in Russia in Tikhonov's magnetotellurics school. Of particular interest are concluding chapters of the book that demonstrate the potential of magnetotellurics in oil and gas surveys, including discovery of the Urengoy gas field in Western Siberia, one of the largest gas fields in the world. This potential also is revealed in studies of the earth's crust and upper mantle.


Electromagnetic Methods in Applied Geophysics

Electromagnetic Methods in Applied Geophysics
Author: Misac N. Nabighian
Publisher: SEG Books
Total Pages: 989
Release: 1988
Genre: Electromagnetic fields
ISBN: 1560800224

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As a slag heap, the result of strip mining, creeps closer to his house in the Ohio hills, fifteen-year-old M. C. is torn between trying to get his family away and fighting for the home they love.


Encyclopedia of Geomagnetism and Paleomagnetism

Encyclopedia of Geomagnetism and Paleomagnetism
Author: David Gubbins
Publisher: Springer Science & Business Media
Total Pages: 1061
Release: 2007-07-19
Genre: Science
ISBN: 1402044232

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This reference encompasses the fields of Geomagnetism and Paleomagnetism in a single volume. Both sciences have applications in navigation, in the search for minerals and hydrocarbons, in dating rock sequences, and in unraveling past geologic movements such as plate motions they have contributed to a better understanding of the Earth. The book describes in fine detail the current state of knowledge and provides an up-to-date synthesis of the most basic concepts. It is an indispensable working tool not only for geophysicists and geophysics students but also for geologists, physicists, atmospheric and environmental scientists, and engineers.


Geomagnetically Induced Currents from the Sun to the Power Grid

Geomagnetically Induced Currents from the Sun to the Power Grid
Author: Jennifer L. Gannon
Publisher: John Wiley & Sons
Total Pages: 410
Release: 2019-09-06
Genre: Science
ISBN: 1119434386

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An introduction to geomagnetic storms and the hazards they pose at the Earth’s surface Geomagnetic storms are a type of space weather event that can create Geomagnetically Induced Currents (GICs) which, once they reach Earth’s surface, can interfere with power grids and transport infrastructure. Understanding the characteristics and impacts of GICs requires scientific insights from solar physics, magnetospheric physics, aeronomy, and ionospheric physics, as well as geophysics and power engineering. Geomagnetically Induced Currents from the Sun to the Power Grid is a practical introduction for researchers and practitioners that provides tools and techniques from across these disciplines. Volume highlights include: Analysis of causes of geomagnetic storms that create GICs Data and methods used to analyze and forecast GIC hazard GIC impacts on the infrastructure of the bulk power system Analysis techniques used in different areas of GIC research New methods to validate and predict GICs in transmission systems


Magnetotelluric Methods

Magnetotelluric Methods
Author: Keeva Vozoff
Publisher:
Total Pages: 763
Release: 1986
Genre:
ISBN: 9780931830006

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Three-dimensional Electromagnetics

Three-dimensional Electromagnetics
Author: Michael L. Oristaglio
Publisher: SEG Books
Total Pages: 720
Release: 1999
Genre: Science
ISBN: 1560800798

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This book covers major techniques used to compute, analyze, visualize, and understand 3D electromagnetic fields in every major application of electrical geophysics. The 44 papers, written especially for this volume, are divided between techniques of 3D modeling and inversion (21 papers) and applications (23 papers). The latter include exploration for minerals and hydrocarbons, regional crustal studies, and environmental surveys. These contributions represent the work of 95 authors from 56 institutions in 13 countries.


Magnetotelluric modeling techniques

Magnetotelluric modeling techniques
Author: Frederick William Patrick
Publisher:
Total Pages: 108
Release: 1969
Genre: Earth currents
ISBN:

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The process of finding one-dimensional Cagniard models to fit experimental magnetotelluric data in a least squares sense is investigated. A modification to the Newton-Raphson method for non-linear regression is developed. This method together with the gradient method is applied to data generated from exact models and is shown to be successful, provided certain conditions on the significance of the model parameters are met. A finite difference scheme for two-dimensional models is developed. The model is restricted to be a layered model in which one of the layers possesses a lateral inhomogeneity. Boundary conditions are applied in such a way as to allow eigenfunction expansions to be written in the homogeneous layers. This in turn allows proper boundary conditions to be applied at the air-earth interface and at infinity. For the scheme which is used, the finite difference equations are written only in the anomalous layer and are solved using a direct method. Results are presented for both the transverse electric and transverse magnetic polarizations for a typical model. The impedances generated from this model are used as experimental data to demonstrate the effect of fitting data generated from a two-dimensional earth with one-dimensional models. (Author).