Investigating the concept and effect of epsilon in seismic hazard disaggregation

Probabilistic seismic hazard analysis is a process that integrates over aleatory uncertainties to calculate the mean annual rate of exceedance (MRE) of given ground-motion parameter values at a site. These rates reflect the contributions of all the sources whose seismic activity is deemed to affect the hazard at that site. Seismic hazard disaggregation provides insights into the earthquake scenarios driving the hazard at a given ground-motion level. These scenarios are characterized by bins of magnitude, M, source-to-site distance, R, and number, ϵ, of standard deviations that the ground-motion parameter is away from its median value for that M-R pair as estimated by a prediction equation

Keywords:

probabilistic seismic hazard analysis (PSHA) , seismic hazard disaggregation , ground-motion prediction equation , epsilon