Seismology

Seismology

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

Industry: Earth science

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Seismology

Isoseismal

Earth science; Seismology

Referring to a line on a map bounding points of equal intensity for a particular earthquake.

Vector

Earth science; Seismology

Quantity having both magnitude and direction.

Liquefaction of soil

Earth science; Seismology

Process of soil and sand behaving like a dense fluid rather than a wet solid mass during an earthquake.

Spike test

Earth science; Seismology

One type of resolution test that can be performed by looking at the impulse response to a spike. The spike is simulated by a localised velocity perturbation consisting of adjacent nodes at a ...

First motion

Earth science; Seismology

On a seismogram, the direction of motion at the beginning of the arrival of a P wave. Conventionally, upward motion indicates a compression of the ground; downward motion, a dilatation.

Obtained from the Fourier transform of the output signal divided by the Fourier transform of the input signal. The values of the frequency response function are the eigenvalues of the system. It is ...