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  • Seismograph | Definition Facts | Britannica
    seismograph, instrument that makes a record of seismic waves caused by an earthquake, explosion, or other Earth -shaking phenomenon Seismographs are equipped with electromagnetic sensors that translate ground motions into electrical changes, which are processed and recorded by the instruments’ analog or digital circuits
  • Seismographs - Keeping Track of Earthquakes | U. S. Geological Survey
    Seismic waves lose much of their energy in traveling over great distances But sensitive detectors (seismometers) can record theses waves emitted by even the smallest earthquakes When these detectors are connected to a system that produces a permanent recording, they are called seismographs
  • Seismometer - Wikipedia
    A seismometer is an instrument that responds to ground displacement and shaking such as caused by quakes, volcanic eruptions, and explosions They are usually combined with a timing device and a recording device to form a seismograph [1]
  • Real-time Seismogram Displays - USGS Earthquake Hazards Program
    These seismogram displays depict ground motion recorded by seismograph stations in real-time, updated every few minutes Each plot represents 24 hours of data from one station Read more »
  • What is a seismograph and how does it work? | SAGE - IRIS
    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 A simple seismometer that is sensitive to up-down motions of the earth can be understood by visualizing a weight hanging on a spring
  • How Does a Seismograph Work? - HowStuffWorks
    A seismograph is a recording device that scientists use to measure earthquakes The goal of a seismograph is to accurately record seismic waves during a quake If you live in a city, you may have noticed the ground shaking when a big truck or a subway train rolls by
  • Seismometers, seismographs, seismograms - whats the difference? How do . . .
    Seismographs are instruments used to record the motion of the ground during an earthquake They are installed in the ground throughout the world and operated as part of a seismographic network The earliest "seismoscope" was invented by the Chinese philosopher Chang Heng in A D 132
  • Seismograph - Earthquake Detection, Recording, Analysis | Britannica
    Because each kind of movement must be separately recorded, three pendulums, one for each direction, are needed for a complete seismograph In general, then, the seismograph is an instrument in which the relative motion of pendulum and ground is recorded
  • Seismograph - Earthquake Detection, Monitoring, Analysis | Britannica
    Seismographs are used for detecting remote underground tests of nuclear weapons, in which the relatively faint seismic waves generated by an underground explosion must be distinguished from natural tremors
  • Seismograph: Definition, Diagram, Working, Types, Applications
    A seismograph is an instrument that measures and records the motion of the ground caused by earthquakes, volcanic eruptions, and other seismic events It consists of a sensor, called a seismometer, that detects the ground motion and a recorder that records the output of the seismometer





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