TSUNAMI MAXIMUM RUNUP AND FOCUSING THROUGH EARTHQUAKE SOURCE PARAMETERS

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2022-8-11

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Sharghivand, Naeimeh

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In this study, the N-wave profile is fitted to the seafloor deformation for a large set of earthquake scenarios, i.e., assuming that the seafloor deformation resulting from an earthquake instantaneously transfers to the sea surface. Hence, the N-wave parameters are identified with respect to the earthquake source parameters allowing to express the initial tsunami profile in terms of the earthquake source parameters. Then, the maximum tsunami runup is presented through the earthquake fault plane parameters using the maximum runup formula. The results are tested against field runup measurements for several events observing good agreement. Then, propagating the finite crest length initial profile defined using earthquake source parameters, the tsunami focusing --abnormal wave height in the leading depression side of an N-wave-- is related to the earthquake source parameters. A tsunami can be much more hazardous for the target coastline when the focusing point is close to the shorelines. The results presented here can help better understand the unusual observations witnessed in the fields.

Subject Keywords

N-wave, Earthquake source parameters, Rapid tsunami runup forecast, Tsunami early warning, Tsunami Focusing, Tsunami amplification

URI

https://hdl.handle.net/11511/98687

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

N. Sharghivand, “TSUNAMI MAXIMUM RUNUP AND FOCUSING THROUGH EARTHQUAKE SOURCE PARAMETERS,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.