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

discriminant

Earth science; Seismology

A repeatable characteristic that can be used to distinguish a natural earthquake from an explosion. The most common discriminant is the ratio of short-period (1-s) P-wave energy ...

singular value decomposition (SVD)

Earth science; Seismology

A matrix transformation technique used to find the inverse of a square matrix.

love wave

Earth science; Seismology

A major type of surface wave having a horizontal motion that is shear or transverse to the direction of propagation (travel). It is named after A. E. H. Love, the English ...

viscoelastic material

Earth science; Seismology

A material which can behave as an elastic solid on a short-time scale and as a viscous fluid on a long-time scale.

displacements

Earth science; Seismology

A measure of the actual ground movement at the receiver, usually in microns. This is obtained by deconvolving a seismogram, removing the instrument response and rotating the ...

refraction

Earth science; Seismology

(1) The deflection of the ray path of a seismic wave caused by its passage from one material to another having different elastic properties. (2) Bending of a tsunami wave front ...