Numerical modeling of tsunami waves generated by the flank collapse of the Cumbre Vieja Volcano (La Palma, Canary Islands): Tsunami source and near field effects

By S. Abadie, Jeffrey C. Harris, Stephan T. Grilli, R. Fabre. 2012

203 citations recorded by the source corpus.

[1] In this work, we study waves generated by the potential collapse of the west flank of the Cumbre Vieja Volcano (CVV; La Palma, Canary Island, Spain) through numerical simulations performed in two stages: (i) the initial slide motion and resulting free surface elevation are first calculated using a 3D Navier-Stokes model; (ii) generated waves are then input into a 2D (horizontal) Boussinesq model to further simulate propagation to the nearby islands. Unlike in earlier work on CVV, besides a similar extreme slide volume scenario of 450 km3, in our simulations: (i) we consider several slide scenarios featuring different volumes (i.e., 20, 40, 80 km3), which partly result from a geotechnical slope stability analysis; (ii) we use a more accurate bathymetry; and (iii) an incompressible version of a multiple-fluid/material Navier-Stokes model. We find wave trains for each scenario share common features in terms of wave directivity, frequency, and time evolution, but maximum elevations near CVV significantly differ, ranging from 600 to 1200 m (for increasing slide volume). Additionally, our computations show that significant energy transfer from slide to waves only lasts for a short duration (order 200 s), which justifies concentrating our best modeling efforts on the early slide motion phase. The anticipated consequences of such wave trains on La Palma and other Canary Islands are assessed in detail in the paper.

Subfields: Earth-Surface Processes, Geophysics

View Paper: https://www.semanticscholar.org/paper/6c187ef96f9a9fcb6c8225e45ad9bc35169267ca

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Citations in the corpus

Numerical simulation of tsunami waves generated by deformable submarine landslides (2013, methodology): “Owing to the large volume involved, landslides can generate very large and energetic surface waves (Abadie et al., 2012), producing high wave run-up along the coast.”
Dispersion of tsunamis: does it really matter? (2013, methodology): “Recently, Abadie et al.(2012) applied a similar strategy, with a slide volume of 500 km 3, and obtained somewhat higher waves close to the Canary Islands than Løvholt et al.”
Numerical Simulation of the 2011 Tohoku Tsunami Based on a New Transient FEM Co-seismic Source: Comparison to Far- and Near-Field Observations (2013, methodology): “…tsunamis, in which dispersive effects are important owing to the shorter wavelengths (WATTS et al. 2003; DAY et al. 2005; TAPPIN et al. 2008; ABADIE et al. 2012), but more recently also to the simulation of coseismic tsunamis (GRILLI et al. 2007, 2010; IOUALALEN et al. 2007; KARLSSON et al.…”