A seismometer is an instrument that responds to ground displacement and shaking such as caused by quakes, volcanic eruptions, and explosions. They are...

The Wood–Anderson seismometer (also known as the Wood–Anderson seismograph) is a torsion seismometer developed in the United States by Harry O. Wood and...

An ocean-bottom seismometer (OBS) is a seismometer that is designed to record the earth's motion under oceans and lakes from man-made sources and natural...

& 2 in 1976, with seismometers mounted on top of the lander. The seismometer on the Viking 1 lander failed. The Viking 2 seismometer collected data for...

Package). The existence of moonquakes was an unexpected discovery from seismometers placed on the Moon by Apollo astronauts from 1969 through 1972. The Apollo...

magnitude 3 quake factors 10³ while a magnitude 5 quake factors 105 and has seismometer readings 100 times larger). The Richter magnitude of an earthquake is...

and uppermost mantle. They range from weak events detectable only by seismometers, to sudden and violent events lasting many minutes which have caused...

earthquake or an underground explosion originates. The primary purpose of a seismometer is to locate the initiating points of earthquake epicenters. The secondary...

were clear differences between geophones and seismometers. Compared to conventional geophones, seismometers are more suitable for detecting extremely small...

believed to have drilled deep into the lunar regolith. Apollo 11 had left a seismometer on the Moon, but the solar-powered unit did not survive its first two-week-long...