Seismology

Seismology

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

Industry: Earth science

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Seismology

Moveout

Earth science; Seismology

The ratio of travel time to the distance traveled.

Shear modulus

Earth science; Seismology

The ratio of shear stress to shear strain of a material during simple shear.

Fault slip rate

Earth science; Seismology

The rate of slip on a fault averaged over a time period involving several large earthquakes.

Acceleration

Earth science; Seismology

The rate of change of velocity of a reference point. Commonly expressed as a fraction or percentage of the acceleration due to gravity (g) where g = 980 cm/s2.

Stick slip

Earth science; Seismology

The rapid displacement that occurs between two sides of a fault when the shear stress on the fault exceeds the frictional stress. Stick-slip displacement on a fault radiates energy in the form of ...

Interplate coupling

Earth science; Seismology

The qualitative ability of a subduction thrust fault to lock and accumulate stress. Strong interplate coupling implies that the fault is locked and capable of accumulating stress, whereas weak ...

Liquefaction

Earth science; Seismology

The process in which a granular solid (soil) takes on the characteristics of a liquid as a result of an increase in pore pressure and a reduction in stress. In other words, solid ground loses ...