Tsunami hazard assessment of American Samoa

dc.contributor.author Templeton, William John en_US
dc.date.accessioned 2015-10-02T21:02:16Z
dc.date.available 2015-10-02T21:02:16Z
dc.date.issued 2014-05 en_US
dc.description M.S. University of Hawaii at Manoa 2014. en_US
dc.description Includes bibliographical references. en_US
dc.description.abstract A preliminary probabilistic tsunami hazard assessment (PTHA) was conducted for American Samoa. The pilot study utilized NEOWAVE to model propagation of tsunamis across the ocean and inundation at the shores of Pago Pago, which is home to key infrastructure of the territory. While the framework is compact and computationally efficient, it takes into account important near-field sources along the Tonga-Kermadec trench that significantly influence the 100 and 500-year inundation. The annual exceedance probability of the earthquake is determined from either the moment magnitude, Mw, or the observed rate of occurrence. The regional rate of Mw 9+ earthquakes is derived from observed global values scaled by local tectonic parameters such as the relative length, convergence rate, and obliquity of convergence of the fault; the rate of Mw 7.3-8.9 earthquakes is based on the global Gutenberg-Richter rate scaled by local tectonic parameters except for Mw 7.3-7.4 and 8.0-8.4, which are functions of the local observed values in historical events. A sensitivity analysis shows that tsunami inundation from far-field, Pacific Rim sources only have secondary effects in the probabilistic framework. The modeled far-field tsunamis with the most impact on American Samoa provide a basis for emergency response in the case of large Mw 9+ earthquakes in the those regions. The 100 and 500-year inundation zones provide a rational account of the exposure to tsunamis, and the analysis lays for the groundwork for conducting a full regional PTHA of American Samoa. en_US
dc.identifier.uri http://hdl.handle.net/10125/100492
dc.language.iso eng en_US
dc.publisher [Honolulu] : [University of Hawaii at Manoa], [May 2014] en_US
dc.relation Theses for the degree of Master of Science (University of Hawaii at Manoa). Ocean and Resources Engineering. en_US
dc.rights All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. en_US
dc.subject probabilistic tsunami hazard assessment en_US
dc.subject PTHA en_US
dc.subject NEOWAVE en_US
dc.title Tsunami hazard assessment of American Samoa en_US
dc.type Thesis en_US
dc.type.dcmi Text en_US
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