Answers

2014-11-17T20:57:57+05:30
Seismograph is a device used by the scientists to measure waves of the earthquake.It actually records the motion of the ground during the earthquake.
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2014-11-17T20:59:08+05:30
Seismograph is an instrument that measures and records details of earthquakes,such as force and duration.
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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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