Ground Motion Relations Calibration


The prediction of ground motion levels (expressed in terms of Peak Ground Velocity PGV) at distance R from the seismic source with specified characteristics (Potency P or Energy E) is important both for evaluation of possible damage (strong ground motion) and for analysis of sensitivity of seismic systems (weak ground motion).

The form of the PGV (R, P or E) relation we use takes into account the effect of a finite size seismic source, providing approximately constant PGV in the vicinity of the source – there are not infinite ground motions at the source! Calibration of the ground motion relation PGV (R, P or E) includes the following steps:

The conditions above for selecting the sites and events are relaxed if the weak ground motion relation is of interest.