Cybershake NZ v20.8: New Zealand simulation-based probabilistic seismic hazard analysis

Introduction: This poster presents the computational workflow and results of the August 2020 version (v20.8) of probabilistic seismic hazard analysis (PSHA) in New Zealand (NZ) based on physics-based ground motion simulations (‘Cybershake NZ’). This version includes several notable advancements resulting from an improved NZ-wide Vs30 model, and revisions to the hybrid broadband ground motion simulation method of Graves and Pitarka (2010, 2015, 2016) based on simulation validation in Lee et al. (2019) which results in changes to the high-frequency method and the empirical site amplification factors around the transition frequency.