Chilkat River bridge
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Chilkat River bridge
Kashwitna River bridge debris
Kashwitna River bridge debris
Kashwitna River bridge debris
Kashwitna River bridge
Kashwitna River bridge
Lowering minnow trap to fish
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Canning River with bars
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Shublik Spring open water
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Hole in the ice from an auger on Canning River
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Minnow trap in icehole
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Michael Carey and Vanessa von Biela on Canning River
Michael Carey and Vanessa von Biela on Canning RiverSupporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Michael Carey and Vanessa von Biela on Canning River
Michael Carey and Vanessa von Biela on Canning RiverSupporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Canning River with bars view
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Vanessa von Biela with cut bank at Canning River
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Copper River sonar on a bridge
Copper River sonar on a bridge
Copper River sonar on a bridge
Canning River with Brooks Range in the background
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Knik River bridge aerial view
Knik River bridge aerial view
Knik River bridge aerial view
Andrew Reeves retrieving samples at Izembek NWR
Andrew Reeves retrieving samples within Izembek National Wildlife Refuge, Alaska as part of USGS research to investigate the persistence of avian influenza viruses in North American wetlands. USGS scientists and colleagues found that influenza A viruses may remain infectious in surface waters of northern wetlands for more than seven months.
Andrew Reeves retrieving samples within Izembek National Wildlife Refuge, Alaska as part of USGS research to investigate the persistence of avian influenza viruses in North American wetlands. USGS scientists and colleagues found that influenza A viruses may remain infectious in surface waters of northern wetlands for more than seven months.
Sea otter skulls being prepared for archival
Skulls were collected in Spring 2018 & 2019 from coastlines throughout Alaska. It is assumed the animals died of natural causes over the preceding winters. They were collected under Marine Mammal Permit # 067925.
Skulls were collected in Spring 2018 & 2019 from coastlines throughout Alaska. It is assumed the animals died of natural causes over the preceding winters. They were collected under Marine Mammal Permit # 067925.
Twentymile River bridge
Twentymile bridge
Evidence of turbidity currents in Eklutna Lake
USGS scientists, working with researchers from the University of Ghent, probed the floor of Eklutna Lake, Anchorage Borough, Alaska, for evidence of turbidity currents triggered by strong shaking during the 2018 Mw7.1 Anchorage earthquake.
USGS scientists, working with researchers from the University of Ghent, probed the floor of Eklutna Lake, Anchorage Borough, Alaska, for evidence of turbidity currents triggered by strong shaking during the 2018 Mw7.1 Anchorage earthquake.
Unuk River in Winter
Unuk River sampling site.
Unuk River sampling site.
Impacts of iron mobilization in a stream
Impacts of iron mobilization in a stream tributary of the Akillik River located in Kobuk Valley National Park, Alaska. These images were taken two years apart. The clear picture was taken in June 2016 and the orange picture was August 2018.
Impacts of iron mobilization in a stream tributary of the Akillik River located in Kobuk Valley National Park, Alaska. These images were taken two years apart. The clear picture was taken in June 2016 and the orange picture was August 2018.
Walking perimeter of DEW Line site
Distant Early Warning (DEW) Line site contractor and Todd Atwood (USGS) walking the perimeter of the Alaska Oliktok Point Dew Line site and discussing polar bear safety.
Distant Early Warning (DEW) Line site contractor and Todd Atwood (USGS) walking the perimeter of the Alaska Oliktok Point Dew Line site and discussing polar bear safety.