Asked by ouefu3
a seismograph record the
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Do you mean “What does a seismograph record?” If so:
A seismograph (or seismometer) records ground motion — the vibrations of the Earth caused by seismic waves — and produces a seismogram, which is ground motion as a function of time. Modern instruments typically record three components (vertical, north–south, east–west) and measure either displacement, velocity, or acceleration.
What you see on a seismogram:
- P‑wave and S‑wave arrivals (first, faster compressional waves and slower shear waves)
- Later surface waves (larger amplitude, longer period)
- Amplitude and frequency information used to estimate earthquake magnitude, distance, and source characteristics
- Non‑earthquake signals (explosions, quarry blasts, cultural noise)
Would you like a short explanation of how a seismograph works, how to read a seismogram, or examples?
A seismograph (or seismometer) records ground motion — the vibrations of the Earth caused by seismic waves — and produces a seismogram, which is ground motion as a function of time. Modern instruments typically record three components (vertical, north–south, east–west) and measure either displacement, velocity, or acceleration.
What you see on a seismogram:
- P‑wave and S‑wave arrivals (first, faster compressional waves and slower shear waves)
- Later surface waves (larger amplitude, longer period)
- Amplitude and frequency information used to estimate earthquake magnitude, distance, and source characteristics
- Non‑earthquake signals (explosions, quarry blasts, cultural noise)
Would you like a short explanation of how a seismograph works, how to read a seismogram, or examples?
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