Seismology

Seismology

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

Industry: Earth science

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Seismology

meizoseismal region

Earth science; Seismology

The area of strong shaking and significant damage in an earthquake.

arrival

Earth science; Seismology

The appearance of seismic energy on a seismic record.

takeoff angle

Earth science; Seismology

The angle that a ray makes with a downward vertical. Used in determining depth phases.

The angle measured from north to the direction from which the energy arrives at a given station. Is used to determine the longitudinal and transverse directions for an incoming ray at a prescribed ...

azimuth

Earth science; Seismology

The angle measured clockwise from north a ray must travel to arrive at a given station.

dip

Earth science; Seismology

The angle between a geologic surface -- for example, a fault plane -- and the horizontal. The direction of dip can be thought of as the direction a ball, if placed upon the tilted surface, would ...