Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/nhess-2017-364
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
03 Nov 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Tsunami fragility curve using field data and numerical simulation of the 2015 tsunami in Coquimbo, Chile
Rafael Aránguiz1,2, Luisa Urra3, Ryo Okuwaki4, and Yuji Yagi5 1Department of Civil Engineering, Universidad Católica de la Santísima Concepción
2National Research Center for Integrated Natural Disaster Management CONICYT/FONDAP/1511007 (CIGIDEN)
3Laboratory of Remote Sensing and Geoinformatics for Disaster Management, International Research Institute of Disaster Science, Tohoku University, Japan
4Graduate School of Life and Environmental Sciences, University of Tsukuba, Japan
5Faculty of Life and Environmental Sciences, University of Tsukuba, Japan
Abstract. The last earthquake which affected Coquimbo city took place in September 2015, with localized damage observed in low areas of the city. In addition, another seismic gap north of the 2015 earthquake rupture area has been identified; therefore, a significant earthquake and tsunami could occur in the near future. The present paper develops the tsunami fragility curve for the city of Coquimbo based on field survey data and tsunami numerical simulations. The inundation depth of the 2015 Chile tsunami in Coquimbo was estimated by means of numerical simulation with the NEOWAVE model and 5 nested grids with a maximum grid resolution of 10 m. The fragility curve exhibited behavior similar to that of other curves in plain areas in Japan, where low damage was observed at relatively high inundation depths. The new fragility curve was used to estimate the damage by possible future tsunamis in the area. The damage assessment showed that ~ 50 % of the structures in the lower area of Coquimbo have a high probability of damage in case of a tsunami generated off the coast of the study area if the city is rebuilt with the same type of structures.

Citation: Aránguiz, R., Urra, L., Okuwaki, R., and Yagi, Y.: Tsunami fragility curve using field data and numerical simulation of the 2015 tsunami in Coquimbo, Chile, Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2017-364, in review, 2017.
Rafael Aránguiz et al.
Rafael Aránguiz et al.
Rafael Aránguiz et al.

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Short summary
The present research applies a methodology to estimate tsunami damage in a city in northern Chile which was recently affected by a tsunami and is now under reconstruction. The results are in good agreement with other results in plain areas in Japan, where low damage was observed at relatively high inundation depths. In addition, the damage assessment showed significant impact in the city in case of a new tsunami event if the city is rebuilt with the same type of structures.
The present research applies a methodology to estimate tsunami damage in a city in northern...
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