seismic detector

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July 13, 2026

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A seismic detector, also known as a seismograph or seismometer, is an instrument used to record seismic waves generated by earthquakes, explosions, or other ground-shaking events. These waves travel through the Earth and provide valuable information about its interior.12

Seismic detectors work by translating ground motions into electrical signals, which are then processed and recorded. Early versions, like Zhang Heng's seismoscope from 132 CE, were less sophisticated, merely indicating that shaking had occurred. Modern seismographs, however, can precisely measure and record these waves, creating a seismogram.1

Beyond studying earthquakes, seismic detectors have numerous applications, including petroleum exploration, monitoring volcanic activity, and even detecting underground nuclear tests. They are crucial tools in seismology, the scientific study of earthquakes and seismic waves.132

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