FROM OFFSHORE TO ONSHORE PROBABILISTIC TSUNAMI HAZARD ASSESSMENT WITH QUANTIFIED UNCERTAINTY: EFFICIENT MONTE CARLO TECHNIQUES

Offshore probabilistic tsunami hazard assessments (PTHAs) are increasingly available for earthquake generated tsunamis. They provide standardized representations of scenarios, their uncertain occurrence-rates, and models the deep ocean waveforms. To quantify onshore hazards it is natural to combine this information with a site-specific inundation model, but computationally challenging do accurately, especially if accounting uncertainties in offshore PTHA. This study reviews an efficient Monte Carlo method recently proposed solve problem. The efficiency comes from preferential sampling scenarios that likely important near site interest, using user-defined importance measure derived theory enables be done without biasing final results. Techniques presented help design test schemes interest (before modelling) errors results (after modelling). methods illustrated examples studies Tongatapu Western Australia.