The 16 September 2015 Chile Tsunami from the Post-Tsunami Survey and Numerical Modeling Perspectives

Aránguiz, Rafael; González, Gabriel; González, J. A.; Catalán, Patricio A.; Cienfuegos, Rodrigo; Yagi, Y.; Okuwaki, Ryo; Urra, Luisa; Contreras, Karla; Río, Ian del; Rojas, Camilo

doi:10.1007/s00024-015-1225-4

Cited by 90 publications

(35 citation statements)

References 17 publications

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“…We believe that the slip deficit since the 1943 earthquake is not enough for the occurrence of the 2015 event, and some amounts of slip deficit further before the 1943 earthquake should be necessary. Moreover, the surveys of tsunami-affected field have suggested that there are spatial differences between tsunami inundation areas along the coast between the 1943 and the 2015 Illapel earthquakes (ARÁ NGUIZ et al 2016). Thus, the 2015 Illapel earthquake is not likely a simple re-occurrence of the 1943 earthquake.…”

Section: Discussionmentioning

confidence: 99%

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Rupture Process During the 2015 Illapel, Chile Earthquake: Zigzag-Along-Dip Rupture Episodes

Okuwaki

Yagi

Aránguiz

et al. 2016

Pure Appl. Geophys.

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We constructed a seismic source model for the 2015 M W 8.3 Illapel, Chile earthquake, which was carried out with the kinematic waveform inversion method adopting a novel inversion formulation that takes into account the uncertainty in the Green's function, together with the hybrid backprojection method enabling us to track the spatiotemporal distribution of high-frequency (0.3-2.0 Hz) sources at high resolution by using globally observed teleseismic P-waveforms. A maximum slip amounted to 10.4 m in the shallow part of the seismic source region centered 72 km northwest of the epicenter and generated a following tsunami inundated along the coast. In a gross sense, the rupture front propagated almost unilaterally to northward from the hypocenter at \2 km/s, however, in detail the spatiotemporal slip distribution also showed a complex rupture propagation pattern: two up-dip rupture propagation episodes, and a secondary rupture episode may have been triggered by the strong high-frequency radiation event at the down-dip edge of the seismic source region. High-frequency sources tends to be distributed at deeper parts of the slip area, a pattern also documented in other subduction zone megathrust earthquakes that may reflect the heterogeneous distribution of fracture energy or stress drop along the fault. The weak excitation of high-frequency radiation at the termination of rupture may represent the gradual deceleration of rupture velocity at the transition zone of frictional property or stress state between the megathrust rupture zone and the swarm area.

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Section: Discussionmentioning

confidence: 99%

“…The post-tsunami surveys showed that the tsunami run-ups varied from 3 to 6 m with a decaying trend at both sides of the source area, and the maximum run-up was observed at Totoral village (30.365°S, 71.670°W; Fig. 1), where it reached 10.8 m discounting splashing up (ARÁ NGUIZ et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Rupture Process During the 2015 Illapel, Chile Earthquake: Zigzag-Along-Dip Rupture Episodes

Okuwaki

Yagi

Aránguiz

et al. 2016

Pure Appl. Geophys.

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“…Aránguiz et al (2016) indicates the tsunami run-up varied between 4 and 6 m in places close to the origin region, even with maximum of 10.8 m. Moreover, local bathymetry and topography promoted the tsunami to cause greater damage in some urbanized coastal locations. The tide gauge record shows that the earthquake occurred shortly after the low tide at the epicentre (Fig.…”

Section: The September 16 2015 Tsunamimentioning

confidence: 99%

“…The 30 submarine part of the bay shows a wide marine platform, close to 10 km, with gentle slope on the seabed. In particular, the Coquimbo Bay exposes depths that do not exceed 50 m inside the bay (Aránguiz et al, 2016). It presents a gentle topography and a more than 110 km long sandy beach only interrupted by the mouth areas of the Culebrón stream and Elqui River which are characterized by the existence of marshlands, much larger in the first case.…”

Section: Study Areamentioning

confidence: 99%

Assessing the tsunami building vulnerability PTVA-3 and PTVA-4 models after the 16S 2015 event in the cities of Coquimbo – La Serena (Chile)

Fritis

Izquierdo

Abad

2018

Preprint

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“…Eventos recientes acaecidos en nuestro país, como los tsunamis 2010, 2014 y 2015 Aránguiz et al, 2015;Catalán et al, 2015;ContrerasLópez et al, 2016) o los temporales de julio de 2013 y agosto de 2015, dejan en evidencia la vulnerabilidad de los emplazamientos costeros, que crece a medida que se construye en terrenos bajos sin atender a la naturaleza de uno de los entornos más dinámicos de la tierra. Para garantizar el uso sustentable del territorio costero, tanto la definición de las zonas potenciales de inundación como el diseño de las obras costeras, se debe considerar cómo han sido y cómo serán los temporales en el futuro.…”

Section: Conclusionesunclassified

El temporal del 8 de agosto de 2015 en las regiones de Valparaiso y Coquimbo, Chile Central

Winckler

Contreras-López

Campos-Caba

et al. 2017

lajar

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RESUMEN.El temporal del 8 de Agosto de 2015 se caracterizó por la ocurrencia conjunta de condiciones meteo-oceanográficas que causaron la destrucción de infraestructura costera y edificaciones en varias localidades del litoral central de Chile. El oleaje extremo se sumó a rachas de vientos provenientes del noroeste y una mínima histórica de la presión atmosférica asociada al sistema frontal. La marea de origen astronómico -aun cuando no extrema-hizo su contribución para peraltar el nivel del mar sobre el cual las olas rompieron con violencia en el borde costero. Para estudiar el evento se procesaron: a) registros de 64 estaciones meteorológicas distribuidas en el sector costero de las regiones de Valparaíso y Coquimbo, b) registros de 6 estaciones mareográficas en Chile Central, c) pronósticos y registro de oleaje en aguas profundas, y d) un modelo de propagación de oleaje desde aguas profundas hacia los sectores más afectados de la región. A partir del análisis de estas variables se explican los daños observados en la infraestructura costera. Palabras clave: registros de viento, oleaje, presión atmosférica, marea astronómica. The storm of August 8, 2015 in the regions of Valparaíso and Coquimbo, Central ChileABSTRACT. A storm of August 8, 2015 was characterized by the joint occurrence of meteorological and oceanographic conditions that caused the destruction of coastal infrastructure and buildings in several localities of the central coast of Chile. The extreme swell was added to wind gusts coming from the northwest winds, and a historical minimum of atmospheric pressure. The tide of astronomical origin -although not extreme-, made its contribution to the sea level banking on which the waves broke violent on the coastal edge. In order to study the event, records of: a) 64 weather stations distributed in the coastal zone of Valparaiso and Coquimbo regions, b) six tide gauge stations, c) forecast and wave records in deep-waters, and d) a model of deep-water wave propagation towards the most affected sectors of the region, were processed. From the analysis of these variables, the observed damages in the coastal infrastructure are explained.

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The 16 September 2015 Chile Tsunami from the Post-Tsunami Survey and Numerical Modeling Perspectives

Cited by 90 publications

References 17 publications

Rupture Process During the 2015 Illapel, Chile Earthquake: Zigzag-Along-Dip Rupture Episodes

Rupture Process During the 2015 Illapel, Chile Earthquake: Zigzag-Along-Dip Rupture Episodes

Assessing the tsunami building vulnerability PTVA-3 and PTVA-4 models after the 16S 2015 event in the cities of Coquimbo – La Serena (Chile)

El temporal del 8 de agosto de 2015 en las regiones de Valparaiso y Coquimbo, Chile Central

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