The Global Disaster Alert and Coordination System provides near real-time alerts about natural disasters around the world and tools to facilitate response coordination, including media monitoring, map catalogues and Virtual On-Site Operations Coordination Centre.
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With increasingly more detailed earthquake fault information, tsunami wave propagation models yield more accurate results. The SWAN-JRC tsunami model, which is also used for the real-time tsunami alerts, was run several times with the most detailed earthquake information available (on 1 October 2009).
Results (with the most detailed resolution of 0.5 minutes) show maximum tsunami wave heights of 7m (in Alaufau, American Samoa).