Lots of food and water. Dehydrated emergency food is a good bet, along with canned stuff that you can live with. Rice/Beans/Grains in sealed containers. Pet food, if necessary.
A bugout bag. Warm Clothes, gloves, shoes, cash (small bills) photocopies of all your credit cards, emergency phone numbers, power bars, spare car keys, pet food, flashlight, knife,
batteries, phone chargers and cords...(This is your
fire emergency bag, too)
Emergency ladder (might as well take care of your fire emergency stuff while you're at it)
Somebody once mentioned a case of whiskey, for barter. I like that idea, but I haven't followed up on it....
Window signs for emergency workers. "Help" and "OK" .
Stash a crowbar and a hammer somewhere that you'll be able to get it if the SHTF and you need to pry heavy stuff off of other stuff.
Get all your camping gear in one place, so you don't have to spend time finding stuff.
Here's a link to Portland maps... Lots of great info when you plug your house number in....
https://www.portlandmaps.com/#
As to insurance, can you even get it in Portland anymore? I talked with an agent not long ago, she told me to not waste my money. As long as the house is bolted to the foundation, the big risk in an earthquake is going to be the chimney falling on the roof, and in most cases the deductible is more than the cost of the repair. YMMV, because of the size of your house....