SEMINAR: What have we learnt from the northeaster Taiheiyou (Japan) Tsunami and implications for Western Australia
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What have we learnt from the northeaster Taiheiyou (Japan) Tsunami and implications for Western Australia : SESE and Oceans Institute Seminar |
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On Friday 11 March 2011, the world was exposed once again to the immense power of tsunamis through an earthquake generated tsunami impacting the coastlines of the whole of Pacific Ocean with the largest impacts on north-east Japan. With a moment magnitude (Mw) of 9.1 the Taiheiyou tsunami is the third largest earthquake on record (after Chile 1960 and Sumatra 2004). The death toll in Japan is expected to exceed 18,000 with hundreds of thousands of people remaining homeless, their homes and livelihoods destroyed. Impacts from damage to the nuclear power station at Fukushima and related radiation issues have, to some extent, moved the focus away from other parts of Japan and around the Pacific Ocean. This event is now recognised as the most expensive natural disaster on record with costs predicted to exceed A$300 billion in Japan alone. In this presentation, an overview of the Northeastern Taiheiyou and historical tsunamis will be presented, including: earthquake and tsunami characteristics, main impact regions, tsunami damages and will be compared to the Sumatra 2004 event. The use of numerical modelling tools and sea level stations, particularly those located offshore in developing tsunami warnings will be presented. One of the major emerging topics are impacts on harbours and marinas where strong currents generated by the tsunami ('harbour-wave‘) caused considerable damage – particularly along the west coast of US and these and other tsunami impacts, with particular reference to Western Australia, will be discussed.
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