Let's pretend The Big One happens 20 minutes from the time you read this post. The 5 powerful minutes of shaking end. You're bruised but otherwise okay. You've prepared for this event for years...you check your hip and breathe a sigh of relief because your cannon is right where it should be, and loaded with 230gr slugs too. Your water storage is massive, and thankfully those straps you invested in did what they were supposed to. And boy oh boy those canned soups sound good right about now! If you subscribe to the belief the major population centers (Salem, Eugene, Gresham, Portland, Beaverton, Hillsboro) will fall into violent chaos, how long do you think it will take? How long will it last? Stores and such will be robbed within hours of the initial quake, and violence will occur as well. But I think it will taper off relatively quickly as all supplies from brick and mortar locations are rapidly drained. I think by day 2 or day 3 there will be the first signs of roving bandits stealing from other peoples' homes. Gunshots will be heard frequently, both from the bandits and people defending their families and supplies. I believe this situation will get worse and continue for many months before it stabilizes due to a military presence. Since I've been preparing, I have no need to leave. House is built to withstand the shaking. Supplies stored inside and outside property in different locations, the goal being to shelter in place to reduce being a target.