IS CONTINENTAL SHELF BATHYMETRY THE MAIN CONTROL FOR TSUNAMI INUNDATION PATTERNS ON THE US EAST COAST?
Detailed model results obtained using the Boussinesq model FUNWAVE-TVD have been used to estimate wave height distribution along the USEC 5-m depth contour. Despite different source magnitudes and locations, plots of wave height show a similar spatial pattern of wave height for all of the tsunamis studied. As a result, we hypothesize that the bathymetry of the continental shelf is the main factor controlling the propagation patterns of tsunamis. A ray tracing analysis was conducted over the continental shelf to test this hypothesis. The wave height distribution obtained from the ray tracing analysis was in good agreement with the results obtained from FUNWAVE-TVD, confirming the role of bathymetric features on tsunami inundation patterns along the USEC.
For this presentation, we first discuss tsunami impact along the USEC. Then, we demonstrate the ray tracing analysis procedure. Finally, after comparing the results of the two analyses, we conclude that locating tsunami hot spots on the USEC is independent of source location and mainly controlled by the bathymetry of the continental shelf.