seismometer
nounUK /saɪzˈmɒmɪtə/
US /saɪzˈmɑːmɪtər/
A seismometer is a tool that feels the ground shake when there is an earthquake.
The seismometer in the science lab recorded a small earthquake last night.
OTHER MEANINGS
2. A scientific instrument that records the strength, duration, and direction of seismic waves.
Researchers placed a seismometer near the volcano to monitor its activity.
3. A device used in oil and gas exploration to measure vibrations from controlled sources underground.
The survey team used a seismometer to map rock layers beneath the field.
4. Any sensor that detects vibrations in the ground for engineering or safety monitoring.
A seismometer on the bridge alerts engineers to unusual shaking.