Earthquake waves are recorded by the help of which of the following instruments?

Options :
  1. Barograph
  2. Hydrograph
  3. Pantograph
  4. Seismograph
Answer and Explanation :-

Answer: Option 4


Seismograph is an 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. A record produced by a seismograph on a display screen or paper printout is called a seismogram. Although originally designed to locate natural earthquakes, seismographs have many other uses, such as petroleum exploration, investigation of the Earth's crust and lower layers, and monitoring of volcanic activity.

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