Used ArcGIS 10.3
I used bathymetry from Natural Earth. Wanted it to be very simplified.
Tectonic plates came from:*https://nordpil.com/resources/tectonic-plates-gis-data/
Got some random historical seismicity from here:*http://scieds.com/cases/cascadia.html and adjusted symbology to show magnitudes.
Squeaked by enough to get a default legend thrown in. That’s about it. I’m a slow mapper.
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