Images

Shruti Khanna (left, California Department of Fish and Wildlife) and Judy Drexler (USGS California Water Science Center) on the USGS Pacific Coastal and Marine Science Center’s research vessel Parke Snavely during fieldwork in the Sacramento-San Joaquin River Delta.

Footprints in mud layer deposited on the sand at Miramar Beach in Montecito, California, by January 9 flood waters coming down San Ysidro Creek.

Installing the linear potentiometer on the USGS Nansemond extensometer. The linear potentiometer is used to measure land-surface movement in response to aquifer system deformation at the USGS Nansemond extensometer.

Patches of dark sand cling to an instrument package that collected data for approximately two weeks at the Mokelumne River site—evidence that currents at the site were strong enough to carry sand, which is heavier than mud, probably during elevated river flows following two storms in the watershed.

USGS) scientist preparing to measure cyanotoxins in water samples using an automated enzyme-linked immunosorbent assay (ELISA) instrument

The USGS National Wildlife Health Center developed WHISPers, a partner driven tool that provides a dynamic, timely, searchable web-based system, to increase public awareness of wildlife disease events and promote collaboration and data sharing among wildlife professionals. This is a screen shot of the web-based tool. 

Leetown Fish Mural Bottlecap Paint Setup

A biologist indicates the location of an acoustic monitoring unit deployed on an island in Humboldt County to listen for Ashy storm-petrels that nest in burrows on the grassy slopes below. 

Fresh excavation of a storm-petrel nesting burrow on an island in Humboldt County. Note the fresh dirt that has been scraped by the bird onto grass in front of the burrow entrance.

A volcano-monitoring station "health monitor" developed by CJ Moniz at the Hawaiian Volcano Observatory (HVO). It consists of three programmable circuit boards (bottom row), voltage sensors (top row), a current sensor (top right corner), and a custom-made voltage sensor for a 48VDC system (tan circuit board on the bottom right).

View of the new (2018) instrument laboratory at the Organic Geochemistry Research Laboratory (OGRL), Lawrence, Kansas. View of a row of instruments in the laboratory.

Organic Geochemistry Research Laboratory — Lawrence, Kansas. Sample processing laboratory.

Organic Geochemistry Research Laboratory — Lawrence, Kansas. Pressurized Fluid Extractor

A view of the Research Vessel (R/V) Polaris' pilot house and wheel.

Organic Geochemistry Research Laboratory — Lawrence, Kansas. Scientists working on at time-of-flight mass spectrometer

USGS biologists with the Western Ecological Research Center (WERC) climb the upper slopes of False Klamath Rock, off the California coast.

Wild horses in the Virginia City Highlands, Nev. 

Dive Safety Officer (DSO) Jake Emmert from Moody Gardens Aquarium enters a flooded coastal cave beneath the tropical forest of the Yucatan Peninsula through a small open-water pool, locally known as a cenote.  Cave diving scientists John Pohlman (USGS) and David Brankovits (USGS/WHOI) will use these entrances over the coming days to access a vast network o

USGS Civil Engineer Brent Hanson measuring the streamflow of the Little Missouri River near Watford City, ND (streamgage 06337000). More information about this streamgage is available at https://waterdata.usgs.gov/nwis/uv/?site_no=06337000. 

Image-based flow cytometer for cell population analysis

Thinning rangelands by removing trees such as juniper is a common mangement action done across the intermountain west. The goals of this type of vegetation treatment typically are to increase forage and habitat for grazing animals, improve soil conditions, and/or reduce risks of catastrophic fire.