seismometer seismometeran instrument that records ground movement; used to detect and measure earthquakesRelated Articles: Glossary: seismic waveDecoding the hum of submarine volcanic eruptionsChanges in Baleen Whale VocalizationsUnderwater Acoustic Impacts of COVID-19How is sound used to study the Earth's history?EarthquakeCTBT Hydrophone StationHow is sound used to explore for oil and gas?How is sound used to monitor nuclear testing?How is sound used to study undersea earthquakes? Chris Knowlton2017-10-27T13:43:29-05:00