Seismology

Seismology

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

Industry: Earth science

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Seismology

Filtering

Earth science; Seismology

Attenuation of certain frequency components of a seismic signal and the amplification of others. For a recorded signal, the process can be accomplished electronically or numerically in a digital ...

Low-velocity zone

Earth science; Seismology

Any layer in the Earth in which seismic wave velocities are lower than in the layers above and below.

Earthquake hazard

Earth science; Seismology

Any physical phenomenon associated with an earthquake that may produce adverse effects on human activities. This includes surface faulting, ground shaking, landslides, liquefaction, tectonic ...

A somewhat poorly understood process; involves the slipping of a fault located in the same region as, but not directly associated with, a fault which ruptures in a major earthquake. Most likely, the ...

Incompressibility

Earth science; Seismology

An index of the resistance of an elastic body, such as a rock, to volume change.

Intensity of earthquake

Earth science; Seismology

A measure of ground shaking obtained from the damage done to structures built by humans, changes in the Earth's surface, and felt reports.

Seismic moment

Earth science; Seismology

Measure of the strength of an earthquake, equal to the product of the force and the moment arm of the double-couple system of forces that produces ground displacements equivalent to that produced by ...