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{{subpages}} '''Geophysics''' is the study of the [[earth]] by quantitative [[physics|physical]] methods, namely [[reflection seismology|seismic]], [[magnetometer |magnetic]], electrical, [[electromagnetic]], thermal and [[radioactivity]] methods. It includes the branches of: * {{r|Seismology}} ([[earthquake]]s and elastic [[wave]]s) * {{r|Gravity}} (Earth's gravitational field) * {{r|Geodesy}} (size and shape of the earth) * {{r|Earth's magnetic field| Geomagnetism}} (including [[ionosphere]], [[magnetosphere]], [[Van Allen radiation belt|Van Allen belts]]) * {{r|Geoelectricity}} and [[electromagnetic]] methods ([[telluric current]]s, resistivity and conductivity structure, ground penetrating radar (GPR)) * {{r|Geothermometry}} (heat from internal processes, [[radioactivity]], heat flow, [[volcano]]logy, and hot springs) * {{r|Hydrology}} (ground and surface water, sometimes including [[glaciology]]) * {{r|Physical oceanography}} * {{r|Tectonophysics}} (geological processes in the earth) * {{r|Exploration geophysics|Exploration, engineering, and environmental geophysics}} * {{r|Geophysical Engineering}} * {{r|Glaciology}} * {{r|Mineral Physics}} * {{r|Engineering geology}} * {{r|Geophysical MASINT}}

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