Unified Interior Regions

On September 28, after about 10 hours of steady rain, an acoustic flow monitor (AFM) on the South Fork Toutle River recorded the passage of small debris flows.

A new assessment of shoreline change along the Pacific Northwest coast from the late 1800s to present found that while the majority of beaches are stable or slightly accreting (adding sand), many Oregon beaches have experienced an increase in erosion hazards in recent decades.

Scientsts from the Pacific Northwest and Colombia work together to understand and communicate volcano hazards.

Officials from South America are helping to save lives in communities around Cascade Range volcanoes by sharing their expertise in a bi-national exchange that brings Colombian emergency managers and scientists to the Pacific Northwest, following a recent visit to Colombia by U.S. counterparts.

Officials from South America are helping to save lives in communities around Cascade Range volcanoes by sharing their expertise in a bi-national exchange that brings Colombian emergency managers and scientists to the Pacific Northwest, following a recent visit to Colombia by U.S. counterparts. 

A new computer model of the Chimacum Creek Basin built to simulate “what-if” scenarios for basin groundwater managers indicates that most of the water recharging the groundwater system flows directly out to marine waters and coastal areas, according to a report by the U.S. Geological Survey.

TACOMA, Wash. — Scientists have sorted out and mapped the aquifers in the Little Spokane River Basin, giving the first detailed picture of the groundwater system, according to a report published by the U.S. Geological Survey, in cooperation with Spokane County.

The spread of a highly virulent fish virus in four separate coastal Washington watersheds from 2007-2011 has been described in a new research paper by the U.S. Geological Survey. The most probable source of the virus was identified as steelhead trout originating from the Columbia River Basin.

USGS scientists took high-tech sensors typically found in devices such as smart phones and embedded them into a new method to monitor riverbed movements that can help protect spawning habitat for endangered salmon. Developed in cooperation with Seattle Public Utilities for the Cedar River, the new method is published in the Journal of Hydrology.

North America's largest vulture, the California condor, once graced the skies of the Pacific Northwest from northern California to British Columbia and was deeply woven into the fabric of many Native American cultures. A new book by two federal scientists documents the condors history in the region, from prehistoric times to the early 20th century.

The Columbia River Gorge Commission and the United States Geological Survey have initiated an agreement that will put the Columbia River Gorge National Scenic Area in the vanguard locally and nationally with an innovative multi-agency resource management and community development partnership.