Disputation: Thomas Zengaffinen-Morris
Doctoral candidate Thomas Zengaffinen-Morris at the Department of Mathematics, Faculty of Mathematics and Natural Sciences, is defending the thesis Influence of Submarine Landslide Failure and Flow on Tsunami Genesis for the degree of Philosophiae Doctor.
Doctoral candidate Thomas Zengaffinen-Morris
The University of Oslo is closed. The PhD defence and trial lecture will therefore be fully digital and streamed directly using Zoom. The host of the session will moderate the technicalities while the chair of the defence will moderate the disputation.
Ex auditorio questions: the chair of the defence will invite the audience to ask questions ex auditorio at the end of the defence. If you would like to ask a question, click 'Raise hand' and wait to be unmuted.
- The webinar opens for participation just before the disputation starts, participants who join early will be put in a waiting room.
Main research findings
Submarine 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.