19 Terms
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Earthquake
Of or pertaining to the natural phenomenon when tectonic plates slide or move causing the Earth's surface also move which causes devastating damage to cities and towns.
Industry: Natural environment
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Earthquake
amplitude (wave)
Natural environment; Earthquake
Maximum deviation from normal of any wave-like disturbance.
asthenosphere
Natural environment; Earthquake
The soft and probably partly molten layer of the earth below the lithosphere. Distinguished by low seismic-wave velocities and high seismic wave attenuation .
attenuation
Natural environment; Earthquake
The decrease in seismic signal amplitude caused by spreading of the wave and absorption and scattering of seismic energy by the materials of the earth as a wave propagates from a source.
b value
Natural environment; Earthquake
A measure of the relative frequency of the occurrence of earthquakes of different sizes.
basement
Natural environment; Earthquake
Igneous and metamorphic rocks underlying the sedimentary rocks of a region and extending to the base of the crust.
first motion
Natural environment; Earthquake
The direction of ground motion as the P-wave arrives at a seismometer. Used to compute fault-plane solutions.
