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Wood-Anderson seismometer
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Wood-Anderson seismometer
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Seismograph
A seismograph records the ground motions of earthquakes as a seismogram, using the principle of inertia: a suspended mass stays still while the frame of the instrument moves with the ground. The line runs from Zhang Heng's seismoscope of about 132 CE and the m…
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SeismographA seismograph records the ground motions of earthquakes as a seismogram, using the principle of inertia: a suspended mass stays still while the frame of the instrument moves with the ground. The line runs from Zhang Heng's seismoscope of about 132 CE and the m…