Tsunami Hazard Assessment of Portions of Island and Skagit Counties,
Randall J. LeVeque, Loyce M. Adams, and Frank I. Gonzalez
University of Washington
This webpage documents the results of a study supported by the
Washington State Emergency Management Division of the tsunami hazard
along the coast of portions of Island and Skagit Counties,
including the entire coast of Whidbey Island and the Skagit River
Delta. Earthquake sources from the Seattle Fault, the Cascadia
Subduction Zone, and the Aleutian Subduction Zone were considered.
Results include inundation depths and times of arrival that will
be useful to coastal communities, as well as tsunami current speeds
and momentum flux. GeoClaw Version 5.6.0 was used for the modeling,
with some modifications as described in the appendices of the report
and the pages below.
The study region was subdivided into 6 polygons for individual GeoClaw runs, as
denoted in the figure below. Note that areas colored pink are where the
topography is below MHW,
but where the land was determined to be initially dry (behind dikes and/or levies).
Results and Plots
- Directory of netCDF files
of maximum depth, speed and other quantities in each
fgmax region, and for each event.
containing gauge time series results (.nc files and some plots).
- kmlfiles.tar.gz These kml files contain plots of the
fgmax results and can be opened in Google Earth.
Input code and supporting files for performing the GeoClaw runs.
(approx 20 MB after untarring.)
Tar file containing some big files needed for running the code
(topo and dtopo files), and for producing plots and the report.
(approx 2.7G after untarring.) Instructions for placing these files
can be found in the README files above.
Jupyter notebook output:
The Jupyter notebooks themselves can be found in the code repository linked above.
These notebooks contain Python code and the resulting output and plots, along
with discussion of what is being done.