Influence of Submarine Landslide Failure and Flow on Tsunami Genesis
Appears in the following Collection
- Matematisk institutt 
AbstractSubmarine mass movements are important sources for tsunamis with potential destructive consequences at coastlines. A famous example from historical records is, for instance, the 1929 Grand Banks tsunami in Canada. This tsunami of several meters' height hit, among other coasts, the south coast of Newfoundland. The event resulted in fatalities and destroyed homes. This doctoral thesis aims to relate the properties of submarine mass movements to tsunami genesis. Thereby, we apply a numerical landslide model that treats the mass movement as a deformable fluid. The main research finding is that the tsunami genesis is sensitive to, among other parameters, the initial yield strength of the mass. The lower the initial yield strength, the larger the velocity and acceleration, which induces a larger maximum tsunami height. The work of this thesis is important, because a better understanding of the physical processes that drive the tsunami genesis can bring prognostic tsunami modelling a step forward.
List of papers
|Paper I: Zengaffinen, T. and Løvholt, F. and Pedersen, G. and Harbitz, C. H. (2020) Effects of submarine rotational slump dynamics on tsunami-genesis: new insight from idealized models and the 1929 Grand Banks event. Geological Society of London, Special Publications, 500. DOI: 10.1144/SP500-2019-201. The article is included in the thesis. Also available at: https://doi.org/10.1144/SP500-2019-201|
|Paper II: Zengaffinen, T. and Løvholt, F. and Pedersen, G. and Muhari, A. (2020) Modelling 2018 Anak Krakatoa Flank Collapse and Tsunami: Effect of Landslide Failure Mechanism and Dynamics on Tsunami Generation. Pure and Applied Geophysics. DOI: 10.1007/s00024-020-02489-x. The article is included in the thesis. Also available at: https://doi.org/10.1007/s00024-020-02489-x|
|Paper III: Zengaffinen-Morris, T. and Urgeles R. and Løvholt, F. (2020) Baseline for probabilistic tsunami hazard through numerical modelling – Gulf of Cadiz case study. Paper in progress. To be published. The paper is included in the thesis.|