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USGS gage 05079000 Red Lake River at Crookston, MN manged by Dakota Water Science Center.

USGS gage number 02310678 Homosassa Springs at Homosassa Springs, FL 

USGS scientist Mike Carlson works to collect a water quality sample from a windmill in the western Plains of San Agustin. Photo taken by Jeff Pepin on April 10th, 2019.

A close-up of the active fumarole field on the north wall of the pit.

Thermal map of Kīlauea Caldera

USGS hydrologist Dan Thomas prepares to measure record flows on the Red River of the North in downtown Fargo, North Dakota. The orange instrument is an acoustic Doppler current profiler, which is used to measure streamflow as it's pulled across the water.

A USGS crew measures flooding on the Red River in downtown Fargo, North Dakota. The orange instrument is an acoustic Doppler current profiler, which is used to measure streamflow as it's pulled across the water.

An instrument called an acoustic Doppler current profiler (ADCP) takes streamflow measurements during flooding. The ADCP is attached to a buoy that is dragged in the water either alongside a boat or by hand. USGS hydrologist Dan Thomas points to the ADCP sensor on the Red River of the North during flooding in downtown Fargo, ND.

Biological Technician Laura (Laney) White adjusts camera settings during 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.

A USGS crew measures high flow during flooding on the Maple River near Mapleton, North Dakota. The yellow instrument is an acoustic Doppler current profiler, which is used to measure streamflow as it's pulled across the water. The crew is standing on a road that had been overtaken by the river. 

A USGS crew measures high flow during flooding on the Maple River near Mapleton, North Dakota. The instrument being pulled across the water is an acoustic Doppler current profiler, which is used to measure streamflow. The truck is parked on a road that had been overtaken by the river. 

This is not a lake! A USGS crew measures high flow during flooding on the Maple River near Mapleton, North Dakota. The instrument being pulled across the water is an acoustic Doppler current profiler (ADCP), which is used to measure streamflow.

Two USGS technicians observe water measurements from a boat with flooding in the background during record Midwest flooding in spring 2019.

A USGS technician steers a watercraft with floodwaters in the background during record Midwest flooding in spring 2019.

A USGS crew prepares to measure streamflow during record flooding on the Maple River near Mapleton, ND, on April 6, 2019. The instrument pictured is an acoustic Doppler current profiler which measures streamflow as it's dragged across the water.

A USGS crew measures streamflow during record flooding on the Red River of the North near Georgetown, ND, on April 6, 2019. The apparatus in the middle of the image is a USGS temporary streamgage installed to monitor flooding, and the orange instrument pictured is an acoustic Doppler current profiler that measures streamflow.

Pilot Barry expertly flies the plane at the correct survey speed and altitude to obtain crisp, clear images.

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.

View of the ocean off the central California coast at the start of a flight.

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.

Biological Technician Amelia DuVall views data in real time during an aerial photographic survey.