Images

Hells Canyon on the Snake River.

Direct fluorescent antibody test (DFAT) for the detection of Renibacterium salmoninarum in tissues. Fluorescing R. salmoninarum cells are visible on a slide.

After receiving permission from the homeowner, a U.S. Geological Survey hydrologist measures the water level in a well.

The Alsea River in the Oregon Coast Range

Scientists from the U.S. Geological Survey and Idaho Power Company collected water, sediment, and biological samples from Brownlee Reservoir as part of an ongoing, cooperative study of mercury cycling in the Hells Canyon complex of reservoirs along the Snake River bordering Idaho and Oregon.

Aerial view of Spirit Lake (center) looking north from above the crater of Mount St. Helens. The lake's outlet to the west (left) was blocked by the 1980 landslide, which required a new engineered outlet to maintain the lake at a safe level. A tunnel was drilled through a bedrock ridge on west side of lake in 1984-1985. Glacier covered Mount Rainier in distance.

A GPS device on the banks of the Kootenai River of northern Idaho, where USGS EROS researchers conducted topobathymetry surveys in 2017 using LiDAR and sonar equipment.A GPS device on the banks of the Kootenai River of northern Idaho, where USGS EROS researchers conducted topobathymetry surveys in 2017 using LiDAR and sonar equipment.

A boat moves off the banks of the Kootenai River in northern Idaho. Researchers from USGS EROS conducted topobathymetry surveys of the river in 2017 using LiDAR and sonar equipment.

A view of the Kootenai River in northern Idaho from a boat. USGS EROS researchers conducted topobathymetry surveys of the river in 2017 using LiDAR and sonar equipment.

Sockeye salmon preparing to spawn upstream of Cle Elum Dam, Washington.

Skagit Bay bathymetry

Between August 19-22, 2017, 140 seismometers were deployed around Mount St. Helens. Instruments were placed on top of the 2004-2008 lava dome, the 1980-86 lava dome, the 1980 crater floor, and around the volcanic cone.

Mount St. Helens, as viewed from the Castle Lake Overlook.

GeoGirls collect water samples and flow measurements to model the transport of volcanic sediments.

GeoGirls deploy seismometers at Mount St. Helens and learn how to interpret earthquake data.

GeoGirls collect water quality data at Coldwater Lake and sieve landslide deposits to learn more about the impact of the 1980 eruption and the transport of volcanic sediment.

A balloon and simple point-and-shoot camera is used to collect digital images that are stitched together to build a 3D elevation model of the landscape.

Meet the GeoGirls, their high school mentors, teacher mentors and scientists at the GeoGirls media day on August 1, 2018.

GeoGirls use ground-penetrating radar to locate rock and ash layers from past eruptions at Mount St. Helens (Mount Adams is pictured in the background).

Mount St. Helens, Washington seen from the flank of Mount Adams to the east.

At Mount St. Helens, the GeoGirls explore the Ape Cave lava tube and learn how to interpret the layers left in the rock wall.