气候变化领域集成服务门户(CCPortal): Effects of Source Faulting and Fringing Reefs on the 2009 South Pacific Tsunami Inundation in Southeast Upolu, Samoa

CCPortal

DOI	10.1029/2020JC016537
	Effects of Source Faulting and Fringing Reefs on the 2009 South Pacific Tsunami Inundation in Southeast Upolu, Samoa
	Bosserelle C.; Williams S.; Cheung K.F.; Lay T.; Yamazaki Y.; Simi T.; Roeber V.; Lane E.; Paulik R.; Simanu L.
发表日期	2020
ISSN	21699275
卷号	125 期号:12
英文摘要	The subduction zone along the northern Tonga Trench has the highest plate convergence rate in the world, but limited records of its seismic and tsunamigenic activities. In 2009, a tsunami generated by an MW 8.1 earthquake doublet caused severe impacts in the region including damage and loss of life on the south shores of Upolu and Savaii Islands, Samoa. Here, we use numerical modeling aided by recorded data and eyewitness accounts to evaluate and identify the published source models in the Tonga Trench region that most suitably represent the 2009 event for use in hazard assessment around Samoa. We show that only a few of the published sources are suitable to reproduce the large inundation observed in Samoa, and none reproduces runup as high as observed in the areas that were most severely impacted on the southeast Upolu coast. The distribution and intensity of runup and inundation are dependent on source model, local topographic and bathymetric features, regional coastal geomorphology, and trapping of short-period waves over the reef flats. The computed results are also influenced by model approximation and grid resolution especially for areas with extreme runup records. Comparison of the relative contributions from the doublet to the southeast Upolu inundation indicates that the initial intraplate normal faulting dominated the east-northeastward tsunami propagation and inundation compared with the subsequent interplate thrust faulting. Overall, two key source models are discussed and identified for future refinement. © 2020. The Authors.
英文关键词	2009 South Pacific Tsunami; earthquake doublet; inundation; modeling; runup; Samoa
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186571
作者单位	Natural Hazards Centre, National Institute of Water and Atmospheric Research (NIWA), Christichurch, New Zealand; Department of Ocean and Resources Engineering, University of Hawaii at Manoa, Honolulu, HI, United States; University of California, Santa Cruz, Santa Cruz, CA, United States; Disaster Management Office, Ministry of Natural Resources and Environment, Apia, Samoa; Now at Management Unit, Green Climate Fund, Samoa Ministry of Finance, Apia, Samoa; E2S Chair HPC-Waves Laboratoire SIAME, Université de Pau et des Pays de l'Adour (E2S UPPA), Anglet, France
推荐引用方式 GB/T 7714	Bosserelle C.,Williams S.,Cheung K.F.,et al. Effects of Source Faulting and Fringing Reefs on the 2009 South Pacific Tsunami Inundation in Southeast Upolu, Samoa[J],2020,125(12).
APA	Bosserelle C..,Williams S..,Cheung K.F..,Lay T..,Yamazaki Y..,...&Simanu L..(2020).Effects of Source Faulting and Fringing Reefs on the 2009 South Pacific Tsunami Inundation in Southeast Upolu, Samoa.Journal of Geophysical Research: Oceans,125(12).
MLA	Bosserelle C.,et al."Effects of Source Faulting and Fringing Reefs on the 2009 South Pacific Tsunami Inundation in Southeast Upolu, Samoa".Journal of Geophysical Research: Oceans 125.12(2020).