Publicaciones

The 16 September 2015 Chile tsunami from the post-tsunami survey and numerical modeling perspectives

Journal

Pure and Applied Geophysics

Institución

Universidad Católica de la Santísima Concepción, Universidad Católica del Norte, Universidad Técnica Federico Santa María, Pontificia Universidad Católica de Chile

Disciplina

Ingeniería Civil, Ciencias de la Tierra

afiliacion

Rafael Aránguiz, Department of Civil Engineering Universidad Católica Ssma Concepción, Concepción, Chile. National Research Center for Integrated Natural Disaster Management CONICYT/FONDAP/1511007 (CIGIDEN), Santiago, Chile

Gabriel González, National Research Center for Integrated Natural Disaster Management CONICYT/FONDAP/1511007 (CIGIDEN), Santiago, Chile. Departamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile

Juan González, National Research Center for Integrated Natural Disaster Management CONICYT/FONDAP/1511007 (CIGIDEN), Santiago, Chile. Departamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile

Patricio A. Catalán245, National Research Center for Integrated Natural Disaster Management CONICYT/FONDAP/1511007 (CIGIDEN), Santiago, Chile. Departamento de Obras Civiles, Universidad Tecnica Federico Santa Maria, Valparaíso, Chile. Centro Científico Tecnológico de Valparaíso (CCTVal), Valparaíso, Chile

Rodrigo Cienfuegos26, National Research Center for Integrated Natural Disaster Management CONICYT/FONDAP/1511007 (CIGIDEN), Santiago, Chile. Departamento de Ingeniería Hidráulica y Ambiental, Pontificia Universidad Católica de Chile, Santiago, Chile

Yuji Yagi, Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan

Ryo Okuwaki, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan

Luisa Urra, Department of Civil Engineering, Universidad Católica Ssma Concepción, Concepción, Chile

Karla Contreras, Department of Civil Engineering, Universidad Católica Ssma Concepción, Concepción, Chile

Ian Del Rio, National Research Center for Integrated Natural Disaster Management CONICYT/FONDAP/1511007 (CIGIDEN), Santiago, Chile. Departamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile

Camilo Rojas, Departamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile

Abstract

On September 16, 2015 a magnitude Mw 8.3 earthquake took place off the coast of the Coquimbo Region, Chile. Three tsunami survey teams covered approximately 700 km of the Pacific coast. The teams surveyed the area, recording 83 tsunami flow depth and runup measurements. The maximum runup was found to be 10.8 m at only one small bay, in front of the inferred tsunami source area. However, it was observed that runup in other locations rarely exceed 6 m. Tsunami runup was larger than those of the 2014 Pisagua event, despite the similar earthquake magnitude. Moreover, tsunami arrival times were found to be shorter than those of previous tsunamis along the Chilean subduction zone. Numerical simulations of the tsunami event showed a good agreement with field data, highlighting that tsunami arrival time and the spatial variation of the tsunami amplitudes were strongly influenced by the bathymetry, coastal morphology and the slip distribution of the causative earthquake.

Keywords

Tsunami, Chile, runup, continental shelf, south pacific ocean

Link

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