[Robert A Cook PE]

No. Not true.

A Mag 8 earthquake trips off of the BC-Washington-Oregon-North CA coast every 350 years. A larger Mag 9 quake offshore trips every 560 years. The last was Jan 30 1703. Which caused a tsunami that destroyed villages in Japan too.

[Robert A Cook PE]

My comment above was wrong - Freepers reported the Mag 7 quake before the USGS earthquake map did!

https://earthquake.usgs.gov/earthquakes/map/?extent=38.85682,-133.27515&extent=45.85941,-121.99219&range=month&magnitude=all&listOnlyShown=true&showUSFaults=true&baseLayer=ocean&settings=true

[old school]

Well, of course, it’s only my opinion.

But...given the population density around the faults I mentioned, I think the death and dislocation would be far greater.

But, as I said, that’s just my opinion.