Geophysical instruments are used for geological study, including rock and soil mechanics, and surveying the earth. Geological study can be subdivided into categories such as geophysics, geochemistry, mineralogy, hydrology, geomorphology. One area of geological study is seismology, the study of earthquakes (a sudden, sometimes violent movement of the earth’s surface from released energy in the earth’s crust) and related phenomena. Geophysical instruments for seismology are helping scientists learn more about the structure and properties of the earth’s crust and the causes and predictors of earthquakes. The use of geophysical instruments for earth quake detection is especially important.
Seismographs and magnetometers are the two main types of geophysical instruments used for surveying the earth’s crust and detecting earthquakes. A seismograph is a geophysical instrument that detects and records the intensity, direction, and duration of earth movements. A seismograph combines a seismometer (to detect movement and earthquakes) with a recording device to permanently record the occurrence and intensity of the earthquake. This allows seismologists to calculate how much energy was released during the earthquake, and to identify the source of the earthquake. A magnetometer is a type of geophysical instrument used to measure the strength and direction of magnetic fields. There are two basic types of magnetometers: scalar magnetometers (which measure the total strength of the magnetic field) and vector magnetometers (which measure the components of the magnetic field in a particular direction). Because magnetometers can measure the magnetic pull of iron, these geophysical instruments can also be used in a geophysical survey to locate iron deposits, ship wrecks, archeological sites, or buried objects.
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Geophysical Instruments - Rugged,reliable,portable Geophysical Instruments Resources See what customers say about Geometrics products See Geometrics Inc. Information |
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Geophysical Instruments Supplier's Directory from MacRAE'S... Electromagnetic geophysical instruments, Gravity geophysical instruments, Induced polarization IP geophysical instruments, Magnetometer geophysical See MacRAE'S BLUE BOOK Information |
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Texas Instruments - Wikipedia, the free encyclopedia Geophysical Service Inc. became a subsidiary of Texas Instruments which it remained until early 1988, when most of GSI was sold to the Halliburton |
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