Comparison of NGA-West2 GMPEs

Nick Gregor, Norman A. Abrahamson, Gail M. Atkinson, David M. Boore, Yousef Bozorgnia, Kenneth W. Campbell, Brian S.J. Chiou, I. M. Idriss, Ronnie Kamai, Emel Seyhan, Walter Silva, Jonathan P. Stewart, Robert Youngs

Research output: Contribution to journalArticlepeer-review

132 Scopus citations


A presentation of the model parameters and comparison of the median ground-motion values from the NGA-West2 GMPEs is presented for a suite of deterministic cases. In general, the median ground motions are similar, within a factor of about 1.5-2.0 for 5 < M < 7 and distances between 10-100 km. Differences increase (on the order of 2-3) for large-magnitude (M > 8) earthquakes at large distances (R > 100-200 km) and for close distances (R < 10 km). A similar increase is observed for hanging-wall sites, and slightly larger differences are observed for soil sites as opposed to rock sites. Regionalization of four of the GMPEs yields similar attenuation rate adjustments based on the different regional data sets. All five GMPE aleatory variability models are a function of magnitude with higher overall standard deviations values for the smaller magnitudes when compared to the large-magnitude events.

Original languageEnglish
Pages (from-to)1179-1197
Number of pages19
JournalEarthquake Spectra
Issue number3
StatePublished - 1 Aug 2014
Externally publishedYes

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics


Dive into the research topics of 'Comparison of NGA-West2 GMPEs'. Together they form a unique fingerprint.

Cite this