a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
From his observations he concluded that the earthquake must have been the result of the elastic rebound of previously stored elastic strain energy in the rocks on either side of the fault.
The hypocenter refers to the site of an earthquake or a nuclear explosion. In the former, it is a synonym of the focus; in the latter, of ground zero.
The epicenter or epicentre /ˈɛpɪsɛntər/ is the point on the Earth's surface that is directly above the hypocenter or focus, the point where an earthquake or underground explosion originates.
an instrument that measures and records details of earthquakes, such as force and duration.Translate seismograph to use over time for:.
the great size or extent of something.
intense: a very large scale earthquake that has the potential to do a lot of damage and that has a magnitude of 7.0 or higher.
tsunami: a long high sea wave caused by an earthquake, submarine landslide, or other disturbance.
A seismic gap is a segment of an active fault known to produce significant earthquakes, that has not slipped in an unusually long time when compared with other segments along the same structure.