On ground motion prediction equations selection

Abstract

Ground motion prediction equations (GMPE) relate the strong ground motion shaking parameters to variables describing earthquake source, path, and on-site impact. From the many available GMPEs, we select those models that are suitable for use in seismic hazard assessment and take into account regional seismic and tectonic conditions [1]. We present a GMPE selection procedure that evaluates multidimensional ground motion trends (e.g., in magnitude, distance, and structural period), examines functional forms, and evaluates quantitative GMPE performance tests versus independent data. Our recommendations include international simulation-based models for seismically active crustal regions, and models for stable regions. To approximate epistemological uncertainties, the selection process takes into account alternative representations of key GMPE attributes such as velocity attenuation over distance [2].