Make advance arrangements for pet housing, in the event your home is uninhabitable. Most emergency shelters won't allow animals. Earthquake kits are available commercially. You can probably find one at a hardware or surplus store or through a camping and outdoor supplier. These stores also often sell first aid kits and dehydrated food products.
Supplies are also available on the web.
TIES 'Hot Spot' map for Portland area . Map of expected shakes in Oregon . Pacific Northwest earthquake info . Ore. Dept. of Geology and Mineral Industry's Earthquake Hazard Program . Purchase Ore. earthquake hazard maps .