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2 August, 00:28

How does seismograph work

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  1. 2 August, 00:35
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    A seismograph is a device for measuring the movement of the earth, and consists of a ground - motion detection sensor, called a seismometer, coupled with a recording system ... As the earth moves, the relative motion between the weight and the earth provides a measure of the vertical ground motion.
  2. 2 August, 00:45
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    As the earth moves, the relative motion between the weight and the earth provides a measure of the vertical ground motion
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