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

signal-to-noise ratio

Earth science; Seismology

The comparison between the amplitude of the seismic signal and the amplitude of noise caused by seismic unrest and (or) the seismic instruments.

core of Earth

Earth science; Seismology

The central part of the Earth below a depth of 2900 kilometers. It is though to be composed mainly of iron and silicates and to be molten on the outside with a solid central ...

segmentation

Earth science; Seismology

The braking of faults along their lengths by other faults that cross them or their limitations in length by other factors such as topography or bends in the strikes of the faults. ...

mohorovicic discontinuity

Earth science; Seismology

The boundary surface or sharp seismic-velocity discontinuity (pronounced Mo-ho-ro-vi-chich) that separates the Earth's crust from the underlying mantle. Named for Andrija ...

recurrence interval

Earth science; Seismology

The approximate length of time between earthquakes in a specific seismically active area.

slip rate

Earth science; Seismology

The relative speed with which the two sides of a fault move past each other. Typically, slip rates are measured in millimeters per year. This figure applies to the motion of a ...