Geophysics Earth Sciences
Geophysics Earth Sciences
Geophysics involves the application of physical theories and measurements to discover the properties of the earth. The discipline dates to antiquity, mainly as a scientific approach to earthquake prediction (a problem still unsolved), but major progress began in the late 1500s with initial work in such areas as magnetism and gravity. Tremendous improvements in instrumentation in the early years of the 20th century generated rapid progress in geophysics and ultimately led, in the 1960s, to the theory of plate tectonics. 4. Exploration geophysics is the use of seismic, gravity, magnetic, electrical, electromagnetic, etc., methods in the search for oil, gas, minerals, water, etc., with the objective of economic exploitation.
Top: Science: Earth Sciences: Geophysics
See Also:
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GSC National Geomagnetism Program - Contains resources of the Geological Survey of Canada on the ever-changing magnetic field. Includes a magnetic declination calculator and compass tutorial, and a database from Canadian magnetic observatories.
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ORAD Laboratory for Satellite Altimetry - Specializes in the analysis of satellite altimeter data related to problems in physical oceanography and marine geophysics.
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Using and Understanding Gravity Data - Addresses gravity studies that involve geophysical mapping and interpretation of features in the Earth's lithosphere.
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Thermophysics Research at the Instituto Superior Técnico - Research on thermal diffusivity of rocks by the laser flash technique at high temperature and the dielectric properties of fluids.
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Seminar in Geophysics: Thermal and Chemical Evolution of the Earth - Course materials are available for download from MIT, this program studies the historical development and the current status of ideas and models from the different research fields, and investigates the different views on mantle flow.
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Application of Geophysical Methods to Highway Related Problems - Provides highway engineers with a basic knowledge of geophysics and nondestructive test (NDT) methods for solving specific engineering problems during geotechnical site investigation, construction, and maintenance of highways.
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The Great Magnet, the Earth - Historical review of geomagnetism, from the discovery of the compass to plate tectonics and space observations. Also has instructions for teachers, glossary, and FAQ.
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EPA Dynamic Field Activities - Geophysical Methods - Common geophysical methods used by the Environmental Protection Agency at hazardous waste sites include: ground penetrating radar, seismic refraction, electromagnetics, and magnetometry. Presents case studies and field-based analytical methods.
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Multicomponent Seismic: A Pragmatist's Primer - Article discussing the different types of multicomponent seismic data, including geophone orientation, recording methods and successful applications.
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Geophysical Exploration for Engineering and Environmental Investigations - Manual describing the geophysical procedures commonly conducted by the Army Corps of Engineers, used for engineering, geological and environmental investigations.
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Michael Studinger's Homepage - Geophysical and glaciological research on the Antarctic continent with aerogeophysical methods.
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Andrei Ol'khovatov - A collection of papers on tectonic activity, atmospheric electricity, meteors, and unexplained natural phenomena.
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Magnetotellurics Basics - Magnetotellurics (MT) is a geophysical method to study the distribution of electrical conductivity in the earth. Article includes examples of recordings and resistivity ranges of standard rock types.
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Origin of the Terrestrial Magnetic Field - Article by Andrija Radovic on how the Earth's geomagnetic field arises.
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MTNet - An international electronic forum for the free exchange of knowledge, programs and data between scientists engaged in the study of the Earth using electromagnetic methods, principally magnetotellurics.
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Gravity Magnetic Glossary - An introduction to the technical terminology used in potential fields, gravity and magenetics studies.
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GNS Science - Research institute in New Zealand specializing in earth systems, seismic data acquisition and processing, laboratory analysis, environmental and natural hazards risk analysis.
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Magnetotellurics MT: Technique, Interpretation, and Application - A detailed article explaining the practical application of magnetotellurics. Includes case studies to present processing and interpretation techniques.
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USGS Office of Ground Water, Branch of Geophysics - Technical support, guidance, and applied research that fosters the appropriate use of surface and borehole geophysical methods for USGS interdisciplinary earth science investigations and the development of geophysical characterization and monitoring meth
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Introduction to Magnetotellurics - A geophysical technique that uses naturally-occurring (or man-made) electromagnetic fields to probe the electrical conductivity structure of the Earth.
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Genetic algorithms in joint inversion - Research discussing some of the advantages and disadvantages of using genetic algorithms for joint inversion of different geophysical datasets, particularly magnetotellurics and seismic receiver functions.
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Vladimir Pinsky - Personal page of a senior researcher at the Seismological Division of the Geophysical Institute of Israel. Papers on seismic signals processing methods, development and application.
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USGS Geomagnetism Homepage - Provides background information on the earth's magnetism, geomagnetic field maps and data, and modelling information.
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The Upper Mantle of the Earth - Information about the highly viscous layer between the Earth's crust and the lower mantle, including its internal structure, its material composition and associated natural phenomena.
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The Exploration of the Earth's Magnetosphere - A detailed non-mathematical introduction to the research on the Earth's magnetic environment in space and its history. Contains master directory of many related text files.
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Sharp Deconvolution - A novel approach to the comprehensive elimination of multiples, which combines both waveform inversion (SDec) and statistical estimation (MSvE).
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Airborne Geophysical Survey Workshop - A collection of papers covering the practical aspects of performing airborne magnetic, radiometric, and electromagnetic surveys.
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Astronomical and Geophysical Data Analysis Services - Collects observations, analyzes, distributes and publishes information and data related to astronomy, geodesy, geophysics and allied sciences.
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