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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

phase velocity

Earth science; Seismology

The velocity of each harmonic component of the surface wave period that depends on the medium parameters such as layer thickness and P and/or S wave velocities. To get good ...

depth of an earthquake

Earth science; Seismology

The value given is the depth below the surface of the mean spheroid.

hertz

Earth science; Seismology

The unit of frequency equal to 1 cycle per second, or 2 PI radians per second.

S wave

Earth science; Seismology

The secondary seismic wave, traveling more slowly than the P wave and consisting of elastic vibrations transverse to the direction of travel. It cannot propagate in a liquid ...

seismometer

Earth science; Seismology

The sensor part of the seismograph, usually a suspended pendulum.

strong ground-motion

Earth science; Seismology

The shaking of the ground near an earthquake source made up of large amplitude seismic waves of various types.

oblique faulting

Earth science; Seismology

The slip on the fault has components both along the dip and along the strike of the fault.