NHESS Natural Hazards and Earth System Sciences NHESS Nat. Hazards Earth Syst. Sci. 1684-9981 Copernicus Publications Göttingen, Germany 10.5194/nhess-10-2631-2010 Model-based tsunami warnings derived from observed impacts Allen S. C. R. 1 Greenslade D. J. M. 1 Centre for Australian Weather and Climate Research, Bureau of Meteorology, Melbourne, Australia 20 12 2010 10 12 2631 2642 Copyright: © 2010 S. C. R. Allen 2010 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://nhess.copernicus.org/articles/10/2631/2010/nhess-10-2631-2010.html The full text article is available as a PDF file from https://nhess.copernicus.org/articles/10/2631/2010/nhess-10-2631-2010.pdf

The Joint Australian Tsunami Warning Centre uses the T2 tsunami scenario database to provide forecast guidance for potential tsunami threats to the coastlines of mainland Australia and its external territories. This study describes a method for generating coastal tsunami warnings from model data obtained from the T2 scenario database. Consideration of observed coastal impacts for nine past events leads to retrospective or "ideal" warning schemes being designed. The 95th percentile values of maximum amplitude within designated coastal zones are examined and thresholds that produce the best match for the ideal schemes are selected. This empirical method is impact-based and allows the T2 scenarios to be used as a proxy for potential impacts on the coast in order to generate warnings for the Australian region.

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