Cybershake NZ v18.6: New Zealand Simulation-Based Probabilistic Seismic Hazard Analysis

Abstract

This poster presents the computational workflow and results of version 18.6 of probabilistic seismic hazard analysis in New Zealand based on physics-based ground motion simulations (‘Cybershake NZ’). In the current work completed to date, the Graves and Pitarka (2010, 2015) hybrid broadband ground motion simulation approach is utilized. Variation in hypocentre location and slip distribution are considered to partially account for the variability in ground motion characteristics. Ruptures from the distributed seismicity model are considered in the total hazard via empirical ground motion models. Intensity measures for sample scenario ruptures and subsequently generated hazard curves, deaggregation results, and uniform-hazard ground motion maps are presented. Improvements for future versions of the ongoing effort are also outlined.