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Seismology
The study of earthquake, seismic sources, and wave propagation through the Earth.
Industry: Earth science
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Seismology
Torsional mode
Earth science; Seismology
A spherical mode where it depends only on the shear-velocity structure and thus are confined to motions the solid shell of the mantle.
Delta function
Earth science; Seismology
A mathematical generalised function that can be regarded as the limit of any several sequences of continuous function. It also has the "sifting " property where the delta function "picks out" the ...
Moment of earthquakes
Earth science; Seismology
A measure of earthquake size related to the leverage of the forces (couples) across the area of the fault slip. The rigidity of the rock times the area of faulting times the amount of slip. ...
Slab
Earth science; Seismology
Refers to the oceanic crustal plate that underthrusts of the continental plate and is consumed by the surface of the Earth mantle.
Locked fault
Earth science; Seismology
A fault that is not slipping because frictional resistance on the fault is greater than the shear stress across the fault. Such faults may store strain for extended periods that is eventually ...
Magnetic polarity reversal
Earth science; Seismology
A change of the Earth's magnetic field to the opposite polarity that has occurred at irregular intervals during geologic time. Polarity reversals can be preserved in sequences of magnetised rocks ...
