A comparative study of earthquake source models in high-order accurate tsunami simulations. (September 2019)

• Record Type: Journal Article
• Authors: Hajihassanpour, Mahya; Bonev, Boris; Hesthaven, Jan S.
• Is Part Of: Ocean modelling. Volume 141(2019)
• Publication Date: 2019-09
• Subjects: Static and dynamic seabed displacement -- Tsunami modeling -- Shallow water equations -- Well-balanced scheme -- Wetting and drying -- Discontinuous Galerkin method; Oceanography -- Periodicals; Océanographie -- Périodiques; Oceanography; Periodicals; 551.46
• DOI: 10.1016/j.ocemod.2019.101429
• Languages: English
• ISSNs: 1463-5003

Abstract

Abstract: The discontinuous Galerkin method is used to solve the non-linear spherical shallow water equations with Coriolis force. The numerical method is well-balanced and takes wetting/drying into account. The two fold goal of this work is a comparative study of dynamic and static tsunami generation by seabed displacement and the careful validation of these source models. The numerical results show that the impact of the choice of seabed displacement model can be significant and that using a static approach may result in inaccurate results. For the validation of the studies, we consider measurements from satellites and buoy networks for the 2011 Tohoku event and the 2004 Sumatra–Andaman tsunami. The results confirm that the method is appropriate for large-scale tsunami simulations and early warning systems. Highlights: Evaluation of tsunami source models using high-order accurate numerical scheme. Simulation of the 2004 Sumatra tsunami and the 2011 Tohoku tsunami. Comparative study of static and dynamic seabed deformation models. Evaluation of results using satellite and buoy data.