Images

Mount Hood dominates the skyline outside Portland, Oregon on a clear day. A major eruption of Mount Hood would pose a great hazard to the regional economy.

Climate change projections indicate a steady increase in temperature progressing through the 21^st century, generally resulting in snowpack reductions, changes to the timing of snowmelt, altered streamflows, and reductions in soil moisture, all of which could affect water management, agriculture, recreation, hazard mitigation, and ecosystems across the nat

USGS Hydrologic Technician Heather Bragg collects suspended-sediment sample from a cableway downstream from Fall Creek Reservoir. Reservoir was drawn down to purge sediment and trapped fish from behind dam in December 2012.

Video available online.

View of Clackamas River, OR.

Oregon Coast at Cannon Beach.

A Pacific chorus frog (also known as Pacific tree frog) perched in reed canary grass in the Finley National Wildlife Refuge in Oregon.

A major eruption of Mount Hood would pose a great hazard to the regional economy.

Map of historic and current sage-grouse range in 2000, provided as a download from the old USGS Sagemap website.

USGS hydrologist surveying channel depth across Fanno Creek, OR

Extending approximately 75 miles north to south and 27 miles east to west, Newberry Volcano and its broad apron of lavas (light yellow shaded area) cover a total area of almost 1,200 square miles, making it the largest volcano of the Cascades volcanic chain. Its lavas stretch north beyond Smith Rock State Park, and south almost to Fort Rock State Natural Area.

Capturing juvenile Chinook salmon in Cougar Reservoir, Oregon using a Lampara net.

A USGS scientist is using radio telemetry to track the overwintering locations of Oregon spotted frogs at Gold Lake bog in Oregon. Oregon spotted frogs spend nearly half the year at overwintering locations, which can include springs, beaver channels, and crevices in lava rock.

USGS scientist meaures how much light is transmitted into the Wallowa River, near Minam, OR.

Global Positioning System receiver (called a GPS monument) at North Rim Station, a monitoring location at Newberry volcano, Oregon.

View looking south across Newberry caldera towards the Big Obsidian flow (left of center) and Paulina Peak, with Paulina Lake in foreground. Photo taken from the north rim of the caldera.

A view looking northeast across the central caldera of Newberry Volcano.  Paulina Lake is in the foreground and East Lake is in the distance.  The Central Pumice Cone lies between the two lakes. Near the bottom of the photo at the south edge of Paulina Lake, the two hills are named the Lakeshore Domes.

View of Mount Hood from Pittock Mansion, Portland, OR.

Photograph of the Willamette River passing through downtown Portland, OR.

Rogue River Canyon in southwest Oregon

The green water, caused by massive blooms of Aphanizomenon flos-aquae, as seen in the wake of a boat, is a common sight each summer on Upper Klamath Lake, Oregon. USGS studies how these blooms effect endangered Lost River and shortnose suckers in the lake.

Oblique photograph of Knife Ridge monitoring site showing approximate soil pit locations.