Images

Northward view in central Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River showing gently rolling topography typical of the southern coastal plain and meandering creek.

Northward view towards Kaktovik from southeastern Arctic National Wildlife Refuge-1002 Area. Location is along Sabbath Creek, a tributary of the Jago River.

Well head of Sourdough oil discovery on Alaska state lease less than one mile west of Arctic National Wildlife Refuge-1002 Area showing minimal disturbance of permafrost polygons.   

Sandhill Crane Pair in flight at Glacial Ridge National Wildlife Refuge

Danaus plexippus. The Monarch Butterfly. Maryland.

Water collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions among the water, magmatic gases and Kīlauea's basaltic rocks. 

The sampling mechanism (on blue tarp) is prepared and the Unoccupied Aircraft System (UAS) is inspected just before take off to collect water from the Halema‘uma‘u crater lake. Brightly colored flagging tape tied to a cable attached to the UAS indicated depth as the sampling tool was lowered into the water. 

USGS-HVO scientists and DOI UAS team members collect samples of water from the Halema‘uma‘u crater lake. 

The Ben Franklin Bridge stretches over the Delaware River. The Delaware River Basin provides water to big cities such as New York and Philadelphia. 

European green crab captured in Washington. Green crabs are invasive to the region and adversely impact the local shellfish industry by outcompeting native species.

A commercially caught wild black carp from the Mississippi River. Credit: USGS.

USGS scientist surveys water levels on the Delaware River while streamflow measurements are made by boat. These measurements help scientists understand the amount of water and constituents being transported by the river. 

Astronauts descending into Meteor Crater in Winslow Arizona. Terrestrial analogs like Meteor Crater provide excellent training grounds for planetary exploration.

Hydrographer Keith Lambert installing a rapid deployment gage at New Mill Creek at Chesapeake, VA in advance of Hurricane Dorian. Photo: Blake Dudding, USGS September 5, 2019

The USGS and partners study the effects of climate change on the Greater Yellowstone Ecosystem. This sunset image was taken from Steamboat Lake, Wind River Indian Reservation, Wind River Range, Wyoming.

A storm-tide sensor deployed on Florida's Indian River Lagoon, at Indian River Drive in St. Lucie County, on Aug. 30, 2019 in preparation for Hurricane Dorian. NOTE: Though the story is about the Carolinas, the photo is from Florida. No photos of the Carolinas deployment were available at the time this story was published.

The USGS and partners study the effects of climate change on the Greater Yellowstone Ecosystem. This image shows a research raft on Spider Lake, Wind River Indian Reservation, Wind River Range, Wyoming.

Wild celery (Vallisneria americana) within lower Pool 13 of the Upper Mississippi River. 

Prevalence of submersed aquatic vegetation, especially wild celery, increased from 1998 to 2008 but has since declined in Pool 13.

The ponded water at the bottom of Halema‘uma‘u has continued to slowly rise. This wide view shows much of Halema‘uma‘u and the fumaroles on the upper walls of the pit.

A team of 4 USGS scientists drive a hole for installation of a shallow groundwater well. These wells help scientists understand the exchange of groundwater and surface water in the Delaware River Basin. 

The GeoGirls visit a volcano monitoring station on the east side of Mount St. Helens, finding out how scientists use different monitoring methods (seismic, GPS, tiltmeter) to understand more about the volcano.