Atkinson and Boore CENA Attenuation

In this example, you can calculate horizontal peak ground acceleration and the psuedoacceleration spectrum at a site in central or eastern North America using attenuation relationships by Atkinson and Boore, 1997. The relationships are for rock sites only. Note that the site-to-fault distance is the hypocentral distance and is valid over the range of 10 to 300 km only. Links to tables of coefficients can be found in Appendix A. Interactive examples for all attenuation relationships can be found in Attenuate©.

Ground motion parameter:

Enter the model parameters you wish to use:

Site to fault distance (km):

Moment magnitude (Mw):

Period (s)
Ln median
median + s

PGA (g)

PGV (cm/s)
Sa (g)

modify spectrum
to attenuate©

Copyright 1999 Janise Rodgers, Pacific Earthquake Engineering Research Center, University of California, Berkeley.