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Magnetotelluric methods are finding increasing applications for imaging electrically conductive structures below the Earth`s surface in both industrial and academic research. In Models and Methods of Magnetotellurics, the authors provide a systematic approach to understanding the modern theory of ill-posed problems which is essential to making confident meaningful interpretation of magnetotelluric and magnetovariational soundings. The interpretation is conducted out in an interactive way, including the hypotheses tests and successive partial inversions with priority of the tippers, magnetic tensors and impedance-phases, which keeps out the destructive static effects of near-surface inhomogeneities. The efficiency of the interpretation is exemplified by new geoelectric models of the Baikal rift zone and the Cascadian subduction zone.
Earth Sciences. --- Geophysics/Geodesy. --- Earth Sciences, general. --- Structural Geology. --- Magnetism, Magnetic Materials. --- Geography. --- Geology, Structural. --- Physical geography. --- Magnetism. --- Géographie --- Tectonique --- Géographie physique --- Magnétisme --- Earth -- Internal structure -- Mathematical models. --- Earth. --- Magnetotelluric prospecting. --- Magnetotelluric prospecting --- Physics --- Mechanical Engineering --- Engineering & Applied Sciences --- Physical Sciences & Mathematics --- Cosmic Physics --- Mining Engineering --- Earth --- Internal structure --- Mathematical models. --- Prospecting, Magnetotelluric --- Telluric current prospecting --- Earth sciences. --- Geology. --- Structural geology. --- Geophysics. --- Magnetic materials. --- Earth currents --- Magnetic prospecting --- Mathematical physics --- Electricity --- Magnetics --- Geotectonics --- Structural geology --- Tectonics (Geology) --- Physical geology --- Cosmography --- Earth sciences --- World history --- Geognosy --- Geoscience --- Natural history --- Geography --- Materials --- Geosciences --- Environmental sciences --- Physical sciences --- Geological physics --- Terrestrial physics --- Earth (Planet)
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Recent progress in numerical methods and computer science allows us today to simulate the propagation of seismic waves through realistically heterogeneous Earth models with unprecedented accuracy. Full waveform tomography is a tomographic technique that takes advantage of numerical solutions of the elastic wave equation. The accuracy of the numerical solutions and the exploitation of complete waveform information result in tomographic images that are both more realistic and better resolved. This book develops and describes state of the art methodologies covering all aspects of full waveform tomography including methods for the numerical solution of the elastic wave equation, the adjoint method, the design of objective functionals and optimisation schemes. It provides a variety of case studies on all scales from local to global based on a large number of examples involving real data. It is a comprehensive reference on full waveform tomography for advanced students, researchers and professionals.
Earth -- Internal structure -- Mathematical models. --- Seismic tomography. --- Seismic waves. --- Physics --- Geology --- Physical Sciences & Mathematics --- Earth & Environmental Sciences --- Dynamic & Structural Geology --- Cosmic Physics --- Seismic waves --- Mathematical geography. --- Mathematical models. --- Geography, Mathematical --- Waves, Seismic --- Earth sciences. --- Geophysics. --- Applied mathematics. --- Engineering mathematics. --- Earth Sciences. --- Geophysics/Geodesy. --- Geophysics and Environmental Physics. --- Applications of Mathematics. --- Earth Sciences, general. --- Geography --- Astronomical geography --- Geodesy --- Geographical positions --- Elastic waves --- Physical geography. --- Mathematics. --- Geography. --- Cosmography --- Earth sciences --- World history --- Math --- Science --- Geosciences --- Environmental sciences --- Physical sciences --- Engineering --- Engineering analysis --- Mathematical analysis --- Geological physics --- Terrestrial physics --- Mathematics
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