Well the Cascadia fault is roughly due and, IIRC, is the only US fault system capable of a 9+. San Andreas is a piker by comparison. I don't recall whether it extends far enough south to take out both Seattle and Portland. If so, it could turn two states red, the hardest way.
Go to PNSN.org (Pacific Northwest Seismic Network). The earthquakes mapped there pretty much outline the area that will be the big one.
Cascadia would take out Vancouver BC, Seattle, Portland and part of NorCal - everything west of I-5. Cascadia subduction would trigger the San Andreas slipfaults which will take out SFO/Bay Area down to LA. Odds right now are 1 in 10. Life in the fast lane.
this guy is informative and entertaining
https://www.youtube.com/watch?v=JR-8PZ_nCvE