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Defining a consistent strategy to model ground-motion parameters for the GEM-PEER Global GMPEs Project

S. Akkar Earthquake Engineering Research Center, Middle East Technical University, 06800 Ankara, Turkey J. Douglas BRGM, Orleans, France C. Di Alessandro Pacific Earthquake Engineering Research Center (PEER), University of California, Berkeley, CA, USA K. Campbell EQECAT Inc., Oakland, CA 94612-1938, USA P. Somerville URS Corporation, Los Angeles, CA 90017, USA F. Cotton Universit̩ Joseph Fourier, Grenoble, France W. Silva Pacific Engineering and Analysis, El Cerrito, CA 94530, USA J. Baker Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305-4020, USA




The project entitled Global Ground Motion Prediction Equations is funded by the Global Earthquake Model (GEM) Foundation and has the objective of recommending a harmonized suite of ground motion prediction equations (GMPEs) that can be used at the global and regional scales for seismic hazard analysis and loss estimation studies. As part of this project, Task 1a experts were commissioned to make recommendations on the critical aspects of seismological predictor parameters that are used by predictive model developers to estimate ground motions for different earthquake scenarios. It is hoped that these recommendations would lead to the optimum description of ground-motion models that can be used efficiently for reliable seismic hazard assessment studies.

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