Images

Map showing one-year probability of accumulation of 1 centimeter (0.4 inch) or more of tephra from eruptions of volcanoes in the Cascade Range.

The popping and cracking of ice in lakes within the Newberry Volcano caldera is picked up by local seismic stations, such as Central Pumice Cone. The lake-ice quakes do not resemble standard volcanic low-frequency or high-frequency events and are sporadically observed in the winter at other ice-covered lakes in Yellowstone, Long Valley, and elsewhere.

Tanner Creek outfall delivers stormwater runoff with insecticides to Tanner Creek, tributary of the Willamette River

A turbid Lost Dog Creek tumbles down steep slopes before feeding Lake Oswego.

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

Mount Hood in the not-so-far distance beyond downtown Portland, Oregon. Photograph taken at the top of the Portland Aerial Tram line on Marquam Hill.

Photograph of the channel station showing the laser distance meter (in red circle) high above the channel used to measure stage (height) of flow in the channel.

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.

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.