Seismology

Seismology

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

Industry: Earth science

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Seismology

Basement

Earth science; Seismology

Igneous and metamorphic rocks that underlie the main sedimentary- rock sequences of a region and extend downward to the base of the crust.

Tesseral harmonic

Earth science; Seismology

Higher order surface spherical harmonics combining latitudinal and longitudinal nodal patterns.

Soil amplification

Earth science; Seismology

Growth in the amplitude of earthquakes when seismic waves pass from rock into less rigid material such as soil.

Head waves

Earth science; Seismology

Head waves are observed in a half-space that is in welded contact with another half-space with higher velocity when the seismic source is located in the lower velocity medium. The ray path of the ...

Displacement that reaches the Earth's surface during slip along a fault. Commonly accompanies moderate and large earthquakes having focal depths less than 20 km. Surface faulting also may accompany ...

Far-field term

Earth science; Seismology

Decays slowly, dominating displacement at large distances and disproportional to the time derivative of the reduced displacement potential, that is if there is a step in the effective pressure at the ...