Images

Invasive water primrose (Ludwigia species) and water hyacinth (Eichhornia crassipes) line the marsh edge in Mandeville Cut near the Port of Stockton, California’s third largest port.  Invasive aquatic vegetation – dominated by Brazilian waterweed, water hyacinth, and water primrose – has increased exponentially in recent years, cloggi

Clearing snow from solar panels which provide power to an instream Passive Integrated Transponder tag detection system in the Wind River, WA. The system detects tagged juvenile and adult Steelhead for population assessment and migratory data.

USGS oceanographer Dan Hoover uses a GPS-equipped backpack to measure sand elevations near the mouth of the San Lorenzo River in Santa Cruz, California, January 12, 2017. Surveys like this make long-term studies of coastal change possible.

Annotated photograph of Bogoslof Island showing the cumulative effects of 2016-17 eruptive activity. A layer of fine muddy appearing ash drapes most of the landscape and covers pre-existing vegetation. The dashed line indicates the area excavated by explosive eruptive activity so far.

A U.S. Geological Survey field crew uses an Acoustic Doppler Current Profiler to measure water velocity on the Truckee River in Reno, Nevada.

An atmospheric river, or narrow band of moisture moving from the tropics to the higher latitudes, hit California in early January and brought the first heavy rains of 2017. While these storms help a drought-stricken state, the onslaught of rain triggers floods and mudslides, and fills rising rivers with sediment and debris.

High-resolution lidar task in coastal Louisiana in partnership with the Louisiana Coastal Protection and Restoration Authority (CPRA) to support a current elevation dataset in a rapidly changing coastal deltaic environment.

Since mid-December 2016, roughly two dozen wildfires in the Pampas region of Argentina have consumed almost 2.5 million acres while unleashing giant plumes of dense smoke above the rural landscapes.

Cumulative impacts of oil and gas production on watersheds in North Dakota between January 2008 and June 2015. Watershed volumes were calculated by combining reported values of oil, brine, and unidentified liquid waste accidentally released during drilling operations.

Morning snowfall at the Leetown Science Center's Administration building.

A sonar-equipped personal watercraft mapping the bathymetry underwater near Santa Cruz, Calif.

Flood in 2017 along Carson River, Nevada. 

Home Zip Codes of Hunters Harvesting Deer in Dane, Iowa, Richland, and Sauk Counties in Wisconsin from 2016-2017

"Lab in a Suitcase" set up in the field to test samples for the fungus (Ceratocystis fimbriata) responsible for Rapid ‘Ōhi‘a Death.

Continued degassing from fumaroles at fissures on Kīlauea Volcano's lower East Rift Zone produce native sulfur crystals when sulfur dioxide and hydrogen sulfide gases react and cool upon reaching the surface. The delicate sulfur crystals are 5–15 mm (0.2–0.6 in) long. USGS photos by A. Lerner, 2018.

USGS scientist Daniel Hoover mapping the beach at Santa Cruz with a GPS-equipped backpack unit.

This panoramic view of the 1935 Humu‘ula flow (black lava) on both sides of the Daniel K. Inouye Highway, which runs east to west in the saddle between Mauna Loa (snow-capped shield volcano at far left) and Mauna Kea (distant right), was taken from the top of Pu‘uhuluhulu. View is to the northwest. The top of Hualālai is visible in far distance (center).

USGS scientists readying a sonar-equipped boat to map the ocean bottom near Santa Cruz, Calif.

 USGS scientists setting up a lidar scanner on the pier to map the beach near Capitola, California.

USGS and USBR workers discuss important issues.

White laze plumes mark locations where lava enters the ocean over a broad area. An open lava channel flows into the ocean at the southern-most plume (middle) near the southern flow margin. The boat ramp at Pohoiki is about 940 m (0.58 mi) farther south of the flow margin. View is toward the west-southwest.