Seismograph | Definition & Facts | Britannica
https://www.britannica.com/science/seismograph
Webseismograph, 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.
DA: 60 PA: 9 MOZ Rank: 31