Geophones are devices used to detect and measure ground vibrations. They work by converting the mechanical energy of these vibrations into electrical signals. Commonly used in fields like seismology and geophysical exploration, geophones help scientists and engineers understand the Earth's subsurface and monitor seismic activity. These instruments are often placed on the ground during surveys to record data from natural or artificial sources, such as earthquakes or explosions. The information gathered can be crucial for oil and gas exploration, as well as for assessing potential hazards in construction projects.