The Seismic Project of the National Tsunami Hazard Mitigation Program

Oppenheimer, David H.; Bittenbinder, Alex N.; Bogaert, Barbara M.; Buland, Ray; Dietz, L. D.; Hansen, R. A.; Malone, Stephen D.; McCreery, Charles S.; Sokolowski, T. J.; Whitmore, Paul M.; Weaver, Craig S.

doi:10.1007/1-4020-3607-8_4

Cited by 1 publication

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“…'' [4]T he corresponding general equation ''Risk =function (Hazard Vulnerability Exposure)'' [WMO,2008] is one in which at least one of the three factors are probabilisticin nature, and with which most other definitions of risk are consistent. An example most relevant to this study is the working definition adopted by the U.S. National Tsunami Hazard Mitigation Program (NTHMP) [Oppenheimer et al, 2009], i.e.,' ' ... risk is defined as thep roduct of the probability of the occurrence of atsunami (i.e., the ''hazard'') times the loss of property and life due to the tsunami.'' PTHA, then,p rovides am ethodology for quantifying probabilitiest hatc haracterize theh azard factori nr isk analysis.…”

Section: Background and Introductionmentioning

confidence: 99%

Probabilistic tsunami hazard assessment at Seaside, Oregon, for near‐ and far‐field seismic sources

et al. 2009

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[1] The first probabilistic tsunami flooding maps have been developed. The methodology, called probabilistic tsunami hazard assessment (PTHA), integrates tsunami inundation modeling with methods of probabilistic seismic hazard assessment (PSHA). Application of the methodology to Seaside, Oregon, has yielded estimates of the spatial distribution of 100-and 500-year maximum tsunami amplitudes, i.e., amplitudes with 1% and 0.2% annual probability of exceedance. The 100-year tsunami is generated most frequently by far-field sources in the Alaska-Aleutian Subduction Zone and is characterized by maximum amplitudes that do not exceed 4m,with an inland extent of less than 500 m. In contrast, the 500-year tsunami is dominated by local sources in the Cascadia Subduction Zone and is characterized by maximum amplitudes in excess of 10 mand an inland extent of more than 1k m. The primary sources of uncertainty in these results include those associated with interevent time estimates, modeling of background sea level, and accounting for temporal changes in bathymetry and topography.N onetheless, PTHA represents an important contribution to tsunami hazard assessment techniques; viewed in the broader context of risk analysis, PTHA provides amethod for quantifying estimates of the likelihood and severity of the tsunami hazard, which can then be combined with vulnerability and exposure to yield estimates of tsunami risk.

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Section: Background and Introductionmentioning

confidence: 99%