1) Earthquake recorder 2) Measuring device 3) Measuring instrument 4) Measuring system
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A very sensitive instrument used to record and measure earthquakes. During an earthquake, vibrations initiated by fracturing of the earth's crust radiate outward from the point of fracture and are detected by seismographs. The visual record produced is called a "seismogram".
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http://earthquakescanada.nrcan.gc.ca/info-gen/glossa-eng.php
An instrument that records seismic waves; that is, vibrations of the earth. Used to record and measure earthquakes.
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http://jersey.uoregon.edu/~mstrick/geology/geo_glossary_page.html
instrument for recording earthquakes
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http://phrontistery.info/s.html
• (n.) An apparatus for registering the shocks and undulatory motions of earthquakes.
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http://thinkexist.com/dictionary/meaning/seismograph/
instrument that makes a record of seismic waves caused by an earthquake, explosion, or other Earth-shaking phenomenon. Seismographs are equipped with ... [5 related articles]
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http://www.britannica.com/eb/a-z/s/59
An instrument used to record seismic waves caused by earthquakes, nuclear explosions, etc.: the record it produces is a seismogram. The simplest seismograph has a horizontal bar, pivoted at one end and with a recording pen at the other. The bar, supported by a spring, bears a heavy weight. As the gr...
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http://www.daviddarling.info/encyclopedia/S/seismograph.html
A sensitive instrument that can detect, amplify, and record ground vibrations too small to be perceived by human beings. (See also accelerograph.)
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http://www.encyclo.co.uk/local/20129
an instrument that records the frequency and magnitude of seismic waves. The vibrations are recorded by a pen on a revolving drum. A seismography can pick up seismic activity thousands of kilometres away.
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http://www.encyclo.co.uk/local/20796
An instrument that records seismic waves; that is, vibrations of the earth.
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http://www.encyclo.co.uk/local/21455
A machine for measuring the intensity of earthquakes by recording the seismic waves that they generate.
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http://www.encyclo.co.uk/local/22291
a device that detects vibrations in the earth. It is used in studying the earth's interior and in prospecting for probably oil-bearing structures. Vibrations are created by discharging explosive in shallow boreholes, by striking the surface with a heavy blow, or by vibrating a heavy plate in contact with the ground. The type and velocity of the vibrations are recorded by the seismograph indicate the general characteristics of the section of earth through which the vibrations pass. ...
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Seis'mo·graph noun [ Greek ......... an earthquake +
-graph .]
(Physics) An apparatus for registering the shocks and undulatory motions of earthquakes.
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http://www.encyclo.co.uk/webster/S/55
Instrument that measures the energy contained in seismic waves from an earthquake or other type of ground displacement.
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http://www.physicalgeography.net/physgeoglos/s.html
It is an instruments that amplifies and record small movements of the ground caused by earthquakes or explosions.
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http://www.vidyagyaan.com/general-knowledge/science/glossary-of-physics-ter
[
n] - a measuring instrument for detecting and measuring the intensity and direction and duration of of movements of the ground (as an earthquake)
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http://www.webdictionary.co.uk/definition.php?query=seismograph
seismograph, seismographic 1. An instrument for recording vibrations of the Earth, particularly of earthquakes or artificially induced energy for the exploration of underlying rock formations and the interior of the Earth. 2. Any of various devices for measuring and recording the vibrations and intensities of earthquakes. 3. An instrument for reco...
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a sensitive piece of equipment used to measure and determine intensity of earthquakes
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https://sciencetrek.org/sciencetrek/topics/earthquakes/glossary.cfm
An instrument for detecting and recording the intensity, direction, and duration of a movement of the ground caused by an earthquake or explosion. See also: Mercalli Scale, Richter Scale, Seismic.
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https://www.encyclo.co.uk/local/20687
noun a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake)
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https://www.encyclo.co.uk/local/20974
An instrument that detects, magnifies, and records vibrations of the Earth, especially earthquakes.
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https://www.encyclo.co.uk/local/22327
An instrument that registers the occurrence of an earthquake and the time it occurred as a written record.
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https://www.encyclo.co.uk/local/23001
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