Seismology

Seismology

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

Industry: Earth science

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Seismology

Strike of fault

Earth science; Seismology

The line of intersection between the fault plane and the surface of the Earth. Its orientation is expressed as the angle west or east of true north.

Spread

Earth science; Seismology

The layout of seismometer or geophone groups from which data from a single shot (the explosive charge) are recorded simultaneously.

The layer of rock located immediately below the earth's surface. Beneath continents, it is typically about 35 km thick, and composed of granite. Under the ocean, the crust is about 5-10 kilometres ...

Asthenosphere

Earth science; Seismology

The layer below the lithosphere that is marked by low seismic-wave velocities and high seismic-wave attenuation.

Resonance

Earth science; Seismology

The largest vibration of a mechanical system (such a soil layer) due to the enhancement of the energy at a a frequency special to that system. Liquefaction can be the result of an earthquake ...

Mainshock

Earth science; Seismology

The largest earthquake in any series of earthquakes; to be definitively called a "mainshock", it should generally be at least half a magnitude unit larger than the next largest quake in the series. ...

Deconvolution

Earth science; Seismology

The inverse of convolution. Used in extracting information (e.g. source-time function, instrument response) from the raw seismic data to retain the source signal or ground displacement.