Youngs et al. Attenuation
In this example, you can calculate peak ground acceleration and the psuedoacceleration spectrum at a site using attenuation relationships by Youngs et al, 1997. Note that the site-to-fault distance is the closest distance to the rupture surface and the relationship is valid over the range of 0 to 100 km only. The valid range of magnitudes is 4 < Mw < 9.5. Links to tables of coefficients can be found in Appendix A. Interactive examples for all attenuation relationships can be found in Attenuate©.