Geologic hazards in the Portland-Vancouver area include faults entirely hidden by river sediments, vegetation, and urban development. A recent aerial geophysical survey revealed patterns in the Earth's magnetic field that confirm the existence of a previously suspected fault running through Portland. It also indicated that this fault may pose a significant seismic threat. This discovery has enabled the residents of the populous area to better prepare for future earthquakes.
|Title||Airborne hunt for faults in the Portland-Vancouver area|
|Authors||Richard J. Blakely, Ray E. Wells, Thomas S. Yelin, Peter H. Stauffer, James W. Hendley|
|Publication Subtype||USGS Numbered Series|
|Series Title||Fact Sheet|
|Record Source||USGS Publications Warehouse|
|USGS Organization||Earthquake Science Center|