Both of these new maps show peak horizontal acceleration as a percent of gravity at the earth's surface. The most violent shaking will result from the 6.8 moment magnitude scenario on the Portland Hills fault. That is demonstrated in the red-colored Portland Hills area. The intensity gradually tapers off to the lighter brown colors on both maps, indicating strong and potentially damaging shaking throughout the region. Welcome to the Metro Natural Hazards Program web site.
Natural hazards can cause major disasters.
The purpose of this Internet web site is to provide hazard information so you can take steps to reduce injuries and property losses before an earthquake or other disaster strikes. Click on one of the hazard map buttons to the left of this page and you will be able to build hazard maps of towns and neighborhoods in the Portland, Oregon metropolitan area. The hazard maps require Internet Explorer 4.x, Netscape 4.x or newer versions of those browsers. The current mapping software works best with Internet Explorer in a Windows environment. Macintosh users need operating system 7.x or newer and the mapping software appears to perform better with a Netscape browser on a Mac.