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

spectral amplification

Earth science; Seismology

A measure of the relative shaking response of different geologic materials. The ratio of the Fourier amplitude spectrum of a seismogram recorded on one material to that computed ...

instrument response

Earth science; Seismology

A set of parameters built into the physics of the recording instrument. These are well known and can be removed from a seismogram by deconvolution of the transfer function and ...

earthquake swarm

Earth science; Seismology

A series of minor earthquakes, none of which may be identified as the main shock, occurring in a limited area and time.

subduction zone

Earth science; Seismology

A dipping ocean plate into the Earth away from an ocean trench. It is usually the locus intermediate and earthquakes defining the Wadati-Benioff zone (e.g. Aleutian, Chile, ...

sag

Earth science; Seismology

A narrow geological depression found in strike-slip fault zones. Those that contain water are called sag ponds.

fault-propagation fold

Earth science; Seismology

A fold formed in front of a fault surface as the fault surface lengthens over a period of geologic time. Commonly associated with the upward termination of a thrust fault.