Earth science

Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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Earth science > Seismology

fault-plane solution

Earth science; Seismology

An analysis using stereographic projection or its mathematical equivalent to determine the attitude of the causative fault and its direction of slip from the radiation pattern of ...

point source

Earth science; Seismology

An approximation used in describing the waves radiated from a seismic source.

least-squares fit

Earth science; Seismology

An approximation of a set of data with a curve such that the sum of the squares of the differences between the observed points and the assumed curve is a minimum.

landslide

Earth science; Seismology

An abrupt movement of geological materials downhill in response to gravity. Landslides can be triggered by an earthquake or other natural causes. Undersea landslides can cause ...

brittle-ductile transition

Earth science; Seismology

A zone within the Earth's crust that separates superjacent brittle rocks from subjacent ductile rocks. Commonly identified as the zone defining the deepest earthquakes in the ...

hot spot

Earth science; Seismology

A volcanic center, 100 to 200 kilometers across and persistent for at least a few tens of millions of years, thought to be the surface expression of a persistent rising plume of ...