Images

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

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Knik River bridge aerial view

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. 

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 bridge

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 sampling site.

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. 

USGS uses survey drones, which are also termed “unoccupied aerial systems” or UAS, to survey walruses resting on shore.  Use of these small survey drones enables collection of replicated surveys with minimal risk to walruses and humans.  Being able to collect numerous replicate surveys enables precise estimates of walrus population abundance when these sur

USGS uses survey drones, which are also termed “unoccupied aerial systems” or UAS, to survey walruses resting on shore.  Use of these small survey drones enables collection of replicated surveys with minimal risk to walruses and humans.  Being able to collect numerous replicate surveys enables precise estimates of walrus population abundance when these sur

A USGS scientist investigates cracks along Trunk Road in Wasilla, Alaska. Extensional crack and damage to roadway along S Trunk Rd.

A USGS scientist stands in a crack in tide flat sediment that opened during strong shaking in the November 30, 2018 Anchorage earthquake. This upland ground crack near Cottonwood Creek, Palmer Slough had horizontal displacements of ~2.5ft locally and observed maximum depth of ~3ft. The crack was observed ~150ft from the active river channel.

Exposed sand within a extensional crack along the Knik River, Alaska. Measuring a crack in sandy sediment along the south bank of the Knik River. This crack was one of many that opened across the Anchorage and Mat-Su region due to strong shaking during the M7.1 November 30, 2018 Anchorage earthquake.

Landslide from bluff below rail grade north of Rabbit Creek. Main scarp of slump/flow slide at Potter Hill. Railroad grade is to the left, tidal flat to the right. Note ponded drainage and disrupted slide material.

2018 Anchorage Earthquake

Lateral spread cracks at the north end of the Port of Anchorage, Alaska. These cracks were among many that opened across the Anchorage and Mat-Su region due to strong shaking during the M7.1 November 30, 2018 Anchorage earthquake.

Lateral spread cracks at northern end of Port of Anchorage. These cracks were among many that opened across the Anchorage and Mat-Su region due to strong shaking during the M7.1 November 30, 2018 Anchorage earthquake.

Extensional cracking and settling around private residence in Chugiak.

2018 Anchorage Earthquake

Crack observed in 2018 along headscarp of 1964 Government Hill landslide.

2018 Anchorage Earthquake