This report summarizes the development of the NGA-West2 Campbell-Bozorgnia empirical ground motion prediction equation (GMPE). This GMPE updates and supersedes the GMPE developed by Campbell and Bozorgnia (2008) as part of the NGA-West1 Project (Power et al. 2008). We used the extensive and expanded PEER NGA-West2 ground motion database recorded from shallow crustal earthquakes in active tectonic domains to develop a GMPE for the “average” (RotD50) horizontal components of peak ground acceleration (PGA), peak ground velocity (PGV), and 5%-damped elastic pseudo-absolute acceleration response spectral ordinates (PSA) at 21 periods ranging from 0.01 to 10 sec. As in our NGA-West1 GMPE, we included terms and predictor variables that modeled magnitude scaling, geometric attenuation, style of faulting, hanging-wall effects, shallow linear and nonlinear site response, and basin response. In our NGA-West2 model we added several new terms and predictor variables, including a new hanging-wall model and related parameters; hypocentral depth; rupture dip, regionally dependent linear shallow site and basin response; regionally dependent anelastic attenuation; and magnitude-dependent between-event and within-event standard deviations. Our new GMPE is considered valid for estimating ground motions from shallow continental earthquakes occurring worldwide in active tectonic domains for magnitudes ranging from 3.3 to as large as 8.5, depending on the style of faulting, and distances as far as 300 km from the source.
May 5, 2013
Campbell, K.W., & Bozorgnia, Y. (2013). NGA-West2 Campbell-Bozorgnia Ground Motion Model for the Horizontal Components of PGA, PGV, and 5%-Damped Elastic Pseudo-Acceleration Response Spectra for Periods Ranging from 0.01 to 10 sec, PEER Report 2013-06. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA. https://peer.berkeley.edu/sites/default/files/webpeer-2013-06-kenneth_w._campbell_and_yousef_bozorgnia.pdf