Skip to main content
U.S. flag

An official website of the United States government

Two Engineers sit on top of Mount St. Helens with seismometer

Detailed Description

Karl Hagel and Pat McChesney, field engineers with the Pacific Northwest Seismic Network team at the University of Washington, install earthquake monitoring equipment on the slopes of Mount St. Helens, with Mount Hood in the distance.


Courtesy of Marc Biundo/University of Washington