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 sitetofault 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©.