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Geophysics seminar: Randall Leveque (University of Washington) "Coupled Seismic/Hydroacoustic/Tsunami Simulations"

01/28/2020 - 12:00pm
Revelle Conference Room (IGPP 4301)
Event Description: 

Talk abstract:

A widespread approach for tsunami simulation is to model the ocean with the shallow water equations (SWE).  The ocean floor deformation that results from a seismic event is often used directly as the initial ocean surface profile for the SWE. This is roughly correct if the ocean is viewed as incompressible, and taking advantage of the separation of the tsunami and seismic timescales when the event occurs far from the inundation area of interest.  Our recent work focuses instead on tsunamis generated by near-field seismic events, the data that might be measured by seafloor sensors in the source region, and their possible use in tsunami early warning.  The dynamic seismic/hydroacoustic and tsunami waves are simulated by modeling the ground as an elastic solid that is coupled with an acoustic ocean layer.  A gravity term is added to the ocean layer in order to capture the tsunami (gravity waves) that are generated by the acoustic waves.  The adaptive mesh refinement codes of Clawpack and GeoClaw ( are used to simulate the resulting waves, in order to explore some of the issues that arise.  This work was performed as part of a project to study the feasibility and utility of an offshore network of sensors on the Cascadia Subduction Zone (

For more information on this event, contact: 
Ignacio Sepulveda
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