Numerical modelling of the tsunami triggered by the Güìmar debris avalanche, Tenerife (Canary Islands): Comparison with field-based data

Giachetti, Thomas; Paris, Raphaël; Kelfoun, Karim; Perez-Torrado, Francisco-Jose

doi:10.1016/j.margeo.2011.03.018

Cited by 79 publications

(64 citation statements)

References 36 publications

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“…In numerical modelling of submerged motion, such an approach has been used for many cases. 20,26,42 Here, we consider a fixed density of ρ = 1, 200 kg m 3 .…”

Section: A Methodologymentioning

confidence: 99%

Rheological considerations for the modelling of submarine sliding at Rockall Bank, NE Atlantic Ocean

et al. 2018

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“…In numerical modelling of submerged motion, such an approach has been used for many cases. 20,26,42 Here, we consider a fixed density of ρ = 1, 200 kg m 3 .…”

Section: A Methodologymentioning

confidence: 99%

Rheological considerations for the modelling of submarine sliding at Rockall Bank, NE Atlantic Ocean

et al. 2018

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“…63), which has been used to simulate tsunamis64656667 using the same equations and boundary conditions as here. The code is based on a double-upwind scheme that limits the numerical dissipation of velocity, and allows calculation of wave amplitudes even at large distances from the source.…”

Section: Methodsmentioning

confidence: 99%

Post-eruptive flooding of Santorini caldera and implications for tsunami generation

et al. 2016

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Caldera-forming eruptions of island volcanoes generate tsunamis by the interaction of different eruptive phenomena with the sea. Such tsunamis are a major hazard, but forward models of their impacts are limited by poor understanding of source mechanisms. The caldera-forming eruption of Santorini in the Late Bronze Age is known to have been tsunamigenic, and caldera collapse has been proposed as a mechanism. Here, we present bathymetric and seismic evidence showing that the caldera was not open to the sea during the main phase of the eruption, but was flooded once the eruption had finished. Inflow of water and associated landsliding cut a deep, 2.0–2.5 km3, submarine channel, thus filling the caldera in less than a couple of days. If, as at most such volcanoes, caldera collapse occurred syn-eruptively, then it cannot have generated tsunamis. Entry of pyroclastic flows into the sea, combined with slumping of submarine pyroclastic accumulations, were the main mechanisms of tsunami production.

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“…This signals that caution is required in predicting 'worst case' scenarios for single large-volume failures when modelling past and future events (Ward and Day 2001;Mader 2001;Gisler et al 2006). This view is supported by tsunami modelling of the Güímar landslide, where to produce the tsunami deposits onshore Gran Canaria, the failure event has to occur as smaller volumes distributed within a multistage collapse (Giachetti et al 2011). …”

Section: Implications For Volcanic Island Landslides and Tsunamigenesismentioning

confidence: 89%

“…Not only do they involve displacement of cubic kilometres of material, but have the potential to generate tsunamis (Ward and Day 2001). Historical events that have demonstrated the ability of landslides to generate tsunamis include 1888Ritter Island, 1929Grand Banks, 1946Aleutian Islands, 1969Lituya Bay, 1972Nice Harbour, 1988Vulcano Island, 1994 Skagway Harbour and 1998 Papua New Guinea (see Hunt et al 2011, 2013a, b, c, andreferences therein) Geological records of tsunami deposits on the Hawaiian and Canary Islands are further testament to the ability of volcanic island flank collapses to generate tsunamis (Pérez-Torrado et al 2006;Giachetti et al 2011). However, modelling of a postulated future La Palma flank collapse as a 500 km 3 single sliding-block has generated tsunami waves with differing properties, such as wave height and inundation (Ward and Day 2001;Mader 2001;Gisler et al 2006;Abadie et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Identification, Correlation and Origin of Multistage Landslide Events in Volcaniclastic Turbidites in the Moroccan Turbidite System

Hunt¹,

Wynn²,

Croudace

2015

Micro-XRF Studies of Sediment Cores

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Generation of tsunamis from submarine landslides is sensitive to several parameters such as their volume, failure mechanism and location of failure relative to sea level. These conditions are often difficult to resolve for past events. However, previous studies of turbidites generated from landslides offer insight into the timing, total event volume and failure mechanism. This study confirms the ~ 165 ka Icod landslide originating from the northern flank of Tenerife as a retrogressive multistage landslide. It also shows that the latest volcanic flank collapse from the Canary Islands, the ~ 15 ka El Golfo landslide, is a retrogressive multistage failure. These inferences are developed using high resolution Itrax μXRF bulk geochemistry to better identify and correlate these subunits in a number of core examples of the Icod (seven subunits) and El Golfo (five subunits) event beds. Subunit variations identified through Itrax studies also allow examination of bulk intra-subunit geochemical heterogeneities. These heterogeneities reflect discrete landslides from a single source. A systematic decrease in calcium composition (proxy for carbonate) suggests initial submarine collapses that retrogressively fail the flank leading to an increasing component from subaerial collapses. However, both grain size and density sorting influence bulk geochemical compositions. The geochemistry of volcanic glasses (determined from Eagle III μXRF analyses) from the subunits of the Icod and El Golfo event beds from Agadir Basin demonstrate that these subunits represent discrete separate failures.

show abstract

Numerical modelling of the tsunami triggered by the Güìmar debris avalanche, Tenerife (Canary Islands): Comparison with field-based data

Cited by 79 publications

References 36 publications

Rheological considerations for the modelling of submarine sliding at Rockall Bank, NE Atlantic Ocean

Rheological considerations for the modelling of submarine sliding at Rockall Bank, NE Atlantic Ocean

Post-eruptive flooding of Santorini caldera and implications for tsunami generation

Identification, Correlation and Origin of Multistage Landslide Events in Volcaniclastic Turbidites in the Moroccan Turbidite System

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