Seismology

Seismology

The study of earthquake, seismic sources, and wave propagation through the Earth.

Industry: Earth science

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Seismology

Rigidity

Earth science; Seismology

An index of the resistance of an elastic body to shear. The ratio of the shearing stress to the amount of angular rotation it produces in a rock sample.

A fracture along which there has been significant displacement of the two sides relative to each other parallel to the fracture. Strike-slip faults are vertical (or nearly vertical) fractures along ...

Operation basis earthquake

Earth science; Seismology

A US Nuclear Regulatory Commission term that specifies the maximum ground motion for which a reactor is expected to continue operating during and after the earthquake.

Mantle wave

Earth science; Seismology

A very long-period (> 60 sec) surface wave (Rayleigh) with corresponding wavelengths of several hundred to about 1200 kilometres and are generated by the largest earthquakes. They can make a ...

Seismograph

Earth science; Seismology

A very sensitive instrument used to record and measure earthquakes. During an earthquake, vibrations initiated by fracturing of the earth's crust radiate outward from the point of fracture and are ...

Safe shutdown earthquake

Earth science; Seismology

A U. S. Nuclear Regulatory Commission term that specifies the maximum ground motion for which a reactor is expected to shut down safely without significant risk to the public.

Rayleigh wave

Earth science; Seismology

A type of surface wave having a retrograde elliptical motion at the Earth's surface. These are the slowest, but often the largest and most destructive, of the wave types caused by an earthquake. ...