Seismology

Seismology

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

Industry: Earth science

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Seismology

Isoseismal line

Earth science; Seismology

A line connecting points on the Earth's surface at which earthquake intensity is the same. It is usually a closed curve around the epicentre.

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 (mb) to 20-s-period ...

Singular value decomposition (SVD)

Earth science; Seismology

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

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.

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 mathematician who ...

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 seismogram into radial ...

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 owing to variations ...