There is a geological theory that says very large quakes shock the entire Ring of Fire and these shocks cause pressure buildups.
In the last 10 years, there have been very large quakes in Indonesia, Japan and moderate ones in New Zealand, Mexico and South America.
The only area NOT hit by a moderate/large quake has been Western USA.
I suspect the next major quake might be off the OR/WA coast.
and look for it in April.