ABSTRACT

Airborne Hunt for Faults in the Portland-Vancouver Area   [open pdf - 107KB]

"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."

Report Number:
FS-105-96
Publisher:
Date:
1996
Copyright:
Public domain
Retrieved From:
U.S. Geological Survey: http://www.usgs.gov/
Format:
pdf
Media Type:
application/pdf
URL:
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