Acceleration Response Spectra

EQE International A consistent set of empirical attenuation relationships is pre-sented for predicting free-field horizontal and vertical com-ponents of peak ground acceleration (PGA), peak ground velocity (PGV), and 5 % damped pseudo-absolute accelera-tion response spectra (PSA). The relationships were derived from attenuation relationships previously developed by the author from 1990 through 1994. The relationships were combined in such a way as to emphasize the strengths and minimize the weaknesses ofeach. The new attenuation rela-tionships are considered to be appropriate for predicting free-field amplitudes of horizontal and vertical components of strong ground motion from worldwide earthquakes of moment magnitude (Mw)> 5 and sites with distances to seismogenic rupture (Rs~[s) < 60 km in active tectonic regions