Earthquakes off West Coast
Lucid observation
In general the are having current quakes is around 300 miles from dense population and 255 miles from light populated areas.
The subduction zone is when you want to pay attention, the far edge of the Juan De Fuca is normally active.
California may want to be alert if the pressure shifts south as suggested by Dutchsinse tends to suggest.
https://yachatsnews.com/tag/juan-de-fuca-plate/
https://open.oregonstate.education/earthquakes/chapter/earthquakes-in-the-juan-de-fuca-plate/