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After record flooding on the Big Sioux River, USGS crews mobilized to take important water measurements.

After record flooding on the Big Sioux River, USGS crews mobilized to take important water measurements.

What does a hardened lava flow look like? This photograph is of the frothy top of a lava flow near the fissure 8 vent, on Kīlauea Volcano's lower East Rift Zone. The different sizes and abundance of bubbles in the surface texture create different colors of the lava, including the light brown and darker black near the boot (for scale).

Blended photo of a wind and solar energy facilities.

An integrated camera and scooter system is ready to deploy in Lake Ontario. The camera is used to record circular transects.

This SCUBA diver is using a camera integrated with a scooter running a circular transect. The white line attached to the scooter is also attached to a pivot point at the center of the sample area.

Sean Stewart and Brendan Hallmark making repairs at the Green Island streamgage  (01358000) on the Hudson River. Photo by Travis Smith (Public Domain)

Members of the LANDFIRE team met in March of 2019 at the USGS Earth Resources Observation and Science (EROS) Center near Sioux Falls, SD.

Preparing the Partenavia aircraft to leave Oxnard Airport for a survey.

The Seabird Studies Team at the USGS Western Ecological Research Center is conducting aerial photographic surveys of the ocean off central and southern California to create comprehensive maps of seabird and marine mammal distributions.

Telephoto zoom of the largest sulfur deposit forming on the NE talus wall in Halema‘uma‘u. The view is from the
USGS Hawaiian Volcano Observatory's K3cam. Images can be viewed on HVO's website at https://volcanoes.usgs.gov/observatories/hvo/webcam.html?webcam=K3cam.

 USGS field biologist Andrea Mott displays a recently marked Lesser Snow Goose.

Biological Technician Laura (Laney) White and Research Biologist, Josh Adams install a newly modified camera mount for in flight testing. This mount tilts forward and back to minimize glare and improve image quality.

 USGS unmanned aerial system (drone) pilot collecting aerial imagery and ground control points for the Coastal Resource Evaulation for Management Applications (CREMA) project on Dauphin Island, Alabama

Groundwater science doesn't take a winter vacation! In this photo, USGS hdyrologic technician Jeremiah Pomerleau has snowshoed to a USGS groundwater monitoring site in Eustis, Maine. USGS scientists visit USGS groundwater observation wells year-round to measure water levels and maintain equipment.

You may know that groundwater serves many purposes worldwide. Of course, drinking water and domestic uses of water are major components of those uses. The ways of getting at groundwater differ depending on the local underground conditions.

Clearing the ice and snow to measure streamflow in South Fork Spread Creek. 

Map of thermal areas in Yellowstone National Park. Most of Yellowstone's more than 10,000 thermal features are clustered together into about 120 distinct thermal areas (shown in red). Lakes are blue. The Yellowstone Caldera is solid black and the resurgent domes are dotted black. Roads are yellow.

Native sulfur crystals precipitate at Sulphur Banks via a chemical reaction between different sulfur-bearing volcanic gases. USGS image by P. Nadeau.

An HVO geologist removes the sampling tube following the gas collection. Inserting the tube down into the degassing source limits contamination of the volcanic gas sample by atmospheric gases. USGS image by P. Nadeau.