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 temperatureSeafloor exploration with fin whale callsGlacial Calving in the Arctic Produces Record Source LevelsHow is sound used to study the Earth’s history?EarthquakeCTBT Hydrophone Station Chris Knowlton2017-10-27T13:43:29-05:00