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near the Sadlerochit River
Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River
Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River
Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River

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.

along Sabbath Creek
along Sabbath Creek, a tributary of the Jago River
along Sabbath Creek, a tributary of the Jago River
along Sabbath Creek, a tributary of the Jago River

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

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
Well head of Sourdough oil discovery on Alaska state lease
Well head of Sourdough oil discovery on Alaska state lease
Well head of Sourdough oil discovery on Alaska state lease

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.   

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.   

Five glass beakers on a lab table
Water collected from the lake at the bottom of Halema‘uma‘u
Water collected from the lake at the bottom of Halema‘uma‘u
Water collected from the lake at the bottom of Halema‘uma‘u

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. 

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. 

Unoccupied Aircraft System is inspected by pilot just before take off
Unoccupied Aircraft System is inspected by pilot just before take off
Unoccupied Aircraft System is inspected by pilot just before take off
Unoccupied Aircraft System is inspected by pilot just before take off

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. 

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. 

Unoccupied Aircraft System flying over volcano crater
Unoccupied Aircraft System returning with a water sample.
Unoccupied Aircraft System returning with a water sample.
The Ben Franklin Bridge stretches over the Delaware River. 
The Ben Franklin Bridge over the Delaware River. 
The Ben Franklin Bridge over the Delaware River. 
The Ben Franklin Bridge over the Delaware River. 

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

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
European green crab
European green crab
European green crab

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

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
Wild Black Carp
Wild Black Carp
Wild Black Carp

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

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.
USGS scientist surveys water levels on the Delaware River 
USGS scientist surveys water levels on the Delaware River 
USGS scientist surveys water levels on the Delaware River 

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. 

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. 

a group of people walk along a rocky outcrop of tan, reddish rocks
Astronauts descending into Meteor Crater in Winslow Arizona.
Astronauts descending into Meteor Crater in Winslow Arizona.
Astronauts descending into Meteor Crater in Winslow Arizona.

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

USGS technician on a bridge with instruments and laptop
Adding a rapid deployment gauge to track Dorian's surge in Virginia
Adding a rapid deployment gauge to track Dorian's surge in Virginia
Adding a rapid deployment gauge to track Dorian's surge in Virginia

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

Sunset from Steamboat Lake, WY
Sunset from Steamboat Lake, WY
Sunset from Steamboat Lake, WY
Sunset from Steamboat Lake, WY

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.

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.

Florida waterfront with storm-tide sensor attached to piling
Scientists track Hurricane Dorian effects on Low Country Coast
Scientists track Hurricane Dorian effects on Low Country Coast
Scientists track Hurricane Dorian effects on Low Country Coast

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.

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.

Research raft on Spider Lake, WY
Research raft on Spider Lake, WY
Research raft on Spider Lake, WY
Research raft on Spider Lake, WY

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.

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, a stringy green aquatic plant growing in the water
Wild celery in Pool 13 of the Upper Mississippi River
Wild celery in Pool 13 of the Upper Mississippi River
Wild celery in Pool 13 of the Upper Mississippi River

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.

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.

Volcano crater
Aerial view of the Halema‘uma‘u water pond
Aerial view of the Halema‘uma‘u water pond
Aerial view of the Halema‘uma‘u water pond

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.

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.
USGS scientists drive a hole for groundwater well
USGS scientists drive a hole for groundwater well
USGS scientists drive a hole for groundwater well

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. 

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. 

Girls standing in a large circle around a volcano monitoring station
The GeoGirls Visit a Volcano Monitoring Station at Mount St. Helens
The GeoGirls Visit a Volcano Monitoring Station at Mount St. Helens
The GeoGirls Visit a Volcano Monitoring Station at Mount St. Helens

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.

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