Attenuation Relation
Attenuation Relation : Term used particularly in the fields of strong ground motion and earthquake engineering to describe the decay of peak spectral ground motion parameters (such as displacement, peak velocity, or acceleration) as a function of distance from the source or a ruptured fault, its magnitude, fault type, and sometimes also the specific travel path and site conditions. Its coefficients are usually derived from statistical analysis of earthquake records. (see, e.g., Chapter 15 in this Manual and Campbell (2003). Similar relations are expected for peak ground rotation parameters
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