seismometer seismometeran instrument that records ground movement; used to detect and measure earthquakes Related Articles: Glossary: seismic waveDecoding the hum of submarine volcanic eruptionsChanges in Baleen Whale VocalizationsUnderwater Acoustic Impacts of COVID-19Hot Topic - Sound waves from earthquakes can reveal changes in ocean temperatureHow 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? Chris Knowlton2017-10-27T13:43:29-05:00