Skip to main content
U.S. flag

An official website of the United States government

October 21, 2021

Residents should not be alarmed if they see a low-flying airplane over parts of southern Washington and northern Oregon starting October 21, 2021.


PORTLAND, Ore. – For about two months, an airplane operated under contract to the U.S. Geological Survey will be making low-level flights over parts of parts of southern Washington and northern Oregon.

Anyone observing the low-flying plane should not be alarmed if they see it fly overhead or pass below the horizon. The contractor will be following all guidelines established by the Federal Aviation Administration and the aircraft will be operated by experienced pilots specially trained for low-level flying.

This airborne survey is designed to collect high-resolution aeromagnetic data that depict the magnetic properties of subsurface geological units that can be used to infer rock types and rock structures at depths of hundreds to thousands of feet below the surface. The project will provide data to support geologic mapping and associated beneficial applications—especially information related to earthquake hazards—to various partners, stakeholders and the public. When complete, the Cascade Locks aeromagnetic data will be available through USGS's publication website:

Please visit the project website for more information.

Get Our News

These items are in the RSS feed format (Really Simple Syndication) based on categories such as topics, locations, and more. You can install and RSS reader browser extension, software, or use a third-party service to receive immediate news updates depending on the feed that you have added. If you click the feed links below, they may look strange because they are simply XML code. An RSS reader can easily read this code and push out a notification to you when something new is posted to our site.