Depending on where you live, it may not matter.
If you haven't researched the Cascade fault, I'd recommend it. I'll see if I can find the web site that discusses it.
Essentially, when the Cascade fault slips, it is massively destructive, creating a tsunami that they believe reached Japan 500 years ago, and dropping large chunks of the land into the water. The difference between this and other quakes is that the other quakes are quick, short jolts lasting only about a half minute. They say when the Cascade goes, it will last at least 5 minutes, which will create a series of massive waves through the earth's crust. Earthquake-reinforced buildings are built to withstand a jolt. They can't withstand the waves, though, and most will come down.
Gosh. I'll have a nice view of the end of the world from my 22nd floor office as it tumbles down the hill into Eliot Bay...
Here is a good site for quake-related info in the PNW:
http://www.pnsn.org/INFO_GENERAL/INFOSHEET/welcome.html
Hmmm. If you do find and post that web site would be mind giving me a ping? I live about 40 miles from St. Helens (as the crow flies) and about 8 miles from the base of Mt. Adams, right smack in the middle of the Cascades. Guess I better fasten my seat belt, again.