Unified Interior Regions

Alaska

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Filter Total Items: 194
A man stands smiling on a high coastal bluff near solar panels and a pole supported by guy wires, with a camera mounted on top.
Date Published: April 1, 2019
Status: Completed

Using Video Imagery to Study Coastal Change: Barter Island, Alaska

For a short study period, two video cameras overlooked the coast from atop the coastal bluff of Barter Island in northern Alaska. The purpose was to observe and quantify coastal processes such as wave run-up, development of rip channels, bluff erosion, and movement of sandbars and ice floes.

Read more about our Arctic research projects:

...

A technician sits at a microscope to identify macrofossils
Date Published: March 7, 2019
Status: Active

Macrofossil and Sediment Processing Laboratory

In the Macrofossil and sediment processing lab we analyze the physical, biological, and geochemical characteristics of peat and sediment samples collected from lake, wetland, and peat cores as proxies for past changes to these depositional environments on timescales of decades to millennia. We primarily study terrestrial wetland ecosystems from subtropical to arctic regions in order to...

Image: Denali Fault
Date Published: February 1, 2019
Status: Active

Alaska Earthquake and Tsunami Hazards

Alaska has more large earthquakes than the rest of the United States combined. More than three-quarters of the state’s population live in an area that can experience a magnitude 7 earthquake. Our research provides objective science that helps stakeholders prepare for and mitigate the effects of future earthquakes and tsunamis, which bolsters the economic health and well-being of Alaska and the...

Flames consume woody fuels in a managed wildfire, New Mexico
Date Published: December 20, 2018
Status: Active

Ecosystems on the Edge: Landscape and Fire Ecology of Forests, Deserts, and Tundra

Climate changes and interacting disturbances such as wildfires, insect and disease outbreaks, and erosion and flooding can perturb and reorganize ecosystems.

A boreal bog surrounded by grasses and plants with the sun setting in the background
Date Published: December 13, 2018
Status: Active

Webinar: Aquatic Ecosystem Vulnerability to Fire and Climate Change in Alaskan Boreal Forests

View this webinar for more information about conservation efforts surrounding aquatic habitats in boreal Alaska.

Alaskan tundra
Date Published: November 29, 2018
Status: Active

Slow earthquakes in Alaska and the Pacific Northwest- Aaron Wech

Slow earthquakes occur regularly in subduction zones of Alaska and the Pacific Northwest. The goal of this project is to use seismic and/or geodetic data to understand how these events occur and what their relationship is to large damaging earthquakes

Arctic glacier
Date Published: November 6, 2018
Status: Active

USGS Glaciers and Climate

Scientists with the USGS Glaciers and Climate Project study the process and impacts of glacier change, including sea-level rise, water resources, environmental hazards and ecosystem links. At the core of this research are mass balance measurements at five glaciers in the United States. These glaciers have been studied since the 1960s, to help us understand how glaciers respond to changes in...

Researchers deploying gravity corer off boat in Chukchi Sea.
Date Published: October 31, 2018
Status: Active

Land-Sea Linkages in the Arctic

The Arctic is undergoing historically unprecedented changes in weather, sea ice, temperature and ecosystems.  These changes have led to greater coastal erosion, greater export of freshwater, and changes to marine and terrestrial ecosystems, habitats, and productivity, among other trends. Meanwhile, many believe the Arctic “amplifies” large climate changes during both warm periods and ice ages...

This shows hand-installing a well to understand ground water in the study area.
Date Published: October 30, 2018
Status: Active

Quantifying groundwater resources and biogeochemical fluxes on Alaska’s North Slope and in the Arctic National Wildlife Refuge- Josh Koch

The Arctic is in a state of rapid change related to thawing permafrost, shifting seasons, altered and novel wildlife migrations, and increasing industrial activity.  Working at the interdisciplinary office in Anchorage will provide you an introduction to many of these processes. You will visit remote sites, participate in and lead important science, and have broad exposure to Artic research....

A scenic of a Aleutian island with fireweed in full bloom
Date Published: October 22, 2018
Status: Active

Alaska Science Center Seminar Series

The USGS Alaska Science Center has a monthly seminar series that runs from October through May.  This series highlights the multiple research programs that are taking place across all disciplines at the center.

Contacts: Yvette Gillies
Lingering oil in the sediments of Knight Island
Date Published: October 18, 2018
Status: Active

Genomic Mechanisms that Underlie Lack of Recovery of Prince William Sound Herring Following the 1990s Collapse

In the decades following the Exxon Valdez Oil Spill (EVOS), it has become increasingly apparent that oil can be toxic at extremely low concentrations to developing fish embryos including herring, where some toxic phenotypes may be apparent during embryogenesis, but some are delayed until later in life. Therefore, acute and lingering oil may act as an insidious selective force within...

Contacts: Paul Hershberger, Ph.D., Jacob Gregg, Ashley MacKenzie, William Richards, Andrew Whitehead, John Incardona, Nat Scholtz
Oil Tanker in Prince William Sound
Date Published: October 18, 2018
Status: Active

Herring Disease Program

Using an approach that involves a combination of field- and laboratory-based studies, we are investigating fish health factors that may be contributing to the failed recovery of Pacific herring populations in Prince William Sound, AK.  Field studies are providing infection and disease prevalence data to inform the population models, serological data that indicate the prior exposure history and...

Filter Total Items: 125
Crevices on glacier, Juneau Icefield
June 26, 2019

Since the 1940s, the Juneau Icefield Research Program (JIRP) has been measuring surface mass balance on the Juneau Icefield. This is the longest ongoing program of its kind in North America. The program nominally occurs between late June and late August, traversing between Juneau, Alaska and Atlin, British Columbia. JIRP has examined the surface mass balance of the Juneau Icefield sin

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June 20, 2019

This data set is four tables with: 1) the body condition and egg counts of Sockeye Salmon captured at several sites along the Pilgrim River 2013-2016, 2) water temperature from 10 automated temperature dataloggers during the summers of 2013-2016, 3) results from an experiment to determine the effect of elevated water temperature on levels of Heat Shock Protein (HSP70) in captive j

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June 18, 2019

This data set contains three spreadsheets with results of Influenza A Virus (IAV) screening in blood from Pacific, Red-throated, and Yellow-billed Loons at three locations in Alaska. Loons were captured along the Beaufort Sea Coast, Chukchi Sea Coast, and Yukon-Kuskokwim Delta from 2008-2017. Three different tests were used and the results are presented in separate spreadsheets. All s

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June 17, 2019

This data set consists of two tables associated with a study of Haemosporidian parasite infection in Northwestern Crows (Corvus caurinus) sampled at six locations throughout southcentral and southeast Alaska in 2007-2008. The first table contains species, location, banding, and morphometric data for all samples. The second table contains results from heamosporidian parasite screening of

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June 14, 2019

This data set includes information on collections of fecal samples from wild gulls (Larus spp.) at seven locations in Alaska, USA. Samples were screened for carbapenemase producing Escherichia coli (E. coli) and tested for resistance to multiple antibiotics.

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June 14, 2019

This data set includes two tables associated with a study of Plasmodium parasite infection in mosquitoes collected in south-central Alaska during the summer of 2016. The first table contains data regarding mosquito collection from three sites using CO2 baited CDC light traps. Mosquitoes were sorted and pooled according to collection date, genus, and location and subsequently screened for Plas

National Petroleum Reserve-Alaska Seismic Legacy Data Archive
April 28, 2019

The National Petroleum Reserve, Alaska, (NPRA) Legacy Data Archive represents one of the largest geological and geophysical data sets held by the U.S. Geological Survey.  Two exploration programs by the U.S. Navy and USGS collected over 12,000 line miles of seismic data and drilled 28 wells.  These programs generated a vast amount of data, analyses, and documents, much of which is presented here.

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April 22, 2019

This data release contains a mark-resight encounter history table for Pacific and Yellow-billed loons from the Arctic Coastal Plain in northern Alaska, 2011-2014.

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April 22, 2019

This data set contains a description of 3 mitochondrial DNA and 93 nuclear DNA Single Nucleotide Polymorphism (SNP) loci and sequence information developed through double digest restriction-site associated DNA sequencing (ddRADseq) techniques for Greater White-Fronted Goose (Anser albifrons) that winter in California.

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April 4, 2019

This data set includes information on collections of fecal or cloacal samples from wild gulls (Larus spp.) at four locations on the Kenai Peninsula, Alaska, USA. Samples were also collected from sockeye salmon harvested as part of the personal-use fisheries on the Kenai and Kasilof Rivers. Samples were screened for Escherichia coli (E. coli) and tested for resistance to multiple antib

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March 26, 2019

This dataset contains two tables of sampling information and size and mass measurements of the Baltic Tellin (Macoma balthica) from sites in Cook Inlet, Alaska, USA, and the Baie de Somme estuary, France.

Filter Total Items: 113
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Year Published: 2015

Mesozoic magmatism and timing of epigenetic Pb-Zn-Ag mineralization in the western Fortymile mining district, east-central Alaska: Zircon U-Pb geochronology, whole-rock geochemistry, and Pb isotopes

The Mesozoic magmatic history of the North American margin records the evolution from a more segmented assemblage of parautochthonous and allochthonous terranes to the more cohesive northern Cordilleran orogenic belt. We characterize the setting of magmatism, tectonism, and epigenetic mineralization in the western Fortymile mining district, east-...

Dusel-Bacon, Cynthia; Aleinkoff, J.N.; Day, W.C.; Mortensen, J.K.
Dusel-Bacon, C., Aleinikoff, J.N., Day, W.C., and Mortensen, J.K., 2015, Mesozoic magmatism and timing of epigenetic Pb-Zn-Ag mineralization in the western Fortymile mining district, east-central Alaska: Zircon U-Pb geochronology, whole-rock geochemistry, and Pb isotopes: Geosphere, v. 11, no. 3, p. 786–822, doi:10.1130/GES01092.1.

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Year Published: 2015

Hydrothermal, biogenic, and seawater components in metalliferous black shales of the Brooks Range, Alaska: Synsedimentary metal enrichment in a carbonate ramp setting

Trace element and Os isotope data for Lisburne Group metalliferous black shales of Middle Mississippian (early Chesterian) age in the Brooks Range of northern Alaska suggest that metals were sourced chiefly from local seawater (including biogenic detritus) but also from externally derived hydrothermal fluids. These black shales are interbedded...

Slack, John F.; Selby, David; Dumoulin, Julie A.
Slack, J. F., Selby, D., & Dumoulin, J. A. (2015). Hydrothermal, Biogenic, and Seawater Components in Metalliferous Black Shales of the Brooks Range, Alaska: Synsedimentary Metal Enrichment in a Carbonate Ramp Setting. Economic Geology, 110(3), 653–675.

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Year Published: 2014

The Late Cretaceous Middle Fork caldera, its resurgent intrusion, and enduring landscape stability in east-central Alaska

Dissected caldera structures expose thick intracaldera tuff and, uncommonly, cogenetic shallow plutons, while remnants of correlative outflow tuffs deposited on the pre-eruption ground surface record elements of ancient landscapes. The Middle Fork caldera encompasses a 10 km × 20 km area of rhyolite welded tuff and granite porphyry in east-...

Bacon, Charles R.; Dusel-Bacon, Cynthia; Aleinikoff, John N.; Slack, John F.
Bacon, C.R., Dusel-Bacon, C., Aleinikoff, J.N., and Slack, J.F., 2014, The Late Cretaceous Middle Fork caldera, its resurgent intrusion, and enduring landscape stability in east-central Alaska: Geosphere, v. 10, p. 1432–1455.

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Year Published: 2014

Seismicity of the Earth 1900-2013 offshore British Columbia-southeastern Alaska and vicinity

The tectonics of the Pacific margin of North America between Vancouver Island and south-central Alaska are dominated by the northwest motion of the Pacific plate with respect to the North America plate at a velocity of approximately 50 mm/yr. In the south of this mapped region, convergence between the northern extent of the Juan de Fuca plate (...

Hayes, Gavin P.; Smoczyk, Gregory M.; Ooms, Jonathan G.; McNamara, Daniel E.; Furlong, Kevin P.; Benz, Harley M.; Villaseñor, Antonio H.
Seismicity of the Earth 1900-2013 offshore British Columbia-southeastern Alaska and vicinity; 2014; OFR; 2010-1083-O; Compiled by Hayes, Gavin P.; Smoczyk, Gregory M.; Ooms, Jonathan G.; McNamara, Daniel E.; Furlong, Kevin P.; Benz, Harley M.; Villaseñor, Antonio

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Year Published: 2014

Maps showing seismic landslide hazards in Anchorage, Alaska

The devastating landslides that accompanied the great 1964 Alaska earthquake showed that seismically triggered landslides are one of the greatest geologic hazards in Anchorage. Maps quantifying seismic landslide hazards are therefore important for planning, zoning, and emergency-response preparation. The accompanying maps portray seismic...

Jibson, Randall W.
Maps showing seismic landslide hazards in Anchorage, Alaska; 2014; Jibson, Randall W.

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Year Published: 2014

High fidelity does not preclude colonization: range expansion of molting Black Brant on the Arctic coast of Alaska

High rates of site fidelity have been assumed to infer static distributions of molting geese in some cases. To test this assumption, we examined movements of individually marked birds to understand the underlying mechanisms of range expansion of molting Black Brant (Branta bernicla nigricans) on the Arctic Coastal Plain (ACP) of Alaska. The...

Flint, Paul L.; Meixell, Brandt W.; Mallek, Edward J.
High fidelity does not preclude colonization: range expansion of molting Black Brant on the Arctic coast of Alaska; 2014; Article; Journal; Journal of Field Ornithology; Flint, Paul L.; Meixell, Brandt W.; Mallek, Edward J.

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Year Published: 2014

Uplift and subsidence reveal a nonpersistent megathrust rupture boundary (Sitkinak Island, Alaska)

We report stratigraphic evidence of land-level change and tsunami inundation along the Alaska-Aleutian megathrust during prehistoric and historical earthquakes west of Kodiak Island. On Sitkinak Island, cores and tidal outcrops fringing a lagoon reveal five sharp lithologic contacts that record coseismic land-level change. Radiocarbon dates, 137Cs...

Briggs, Richard W.; Engelhart, Simon E.; Nelson, Alan R.; Dura, Tina; Kemp, Andrew C.; Haeussler, Peter J.; Corbett, D. Reide; Angster, Stephen J.; Bradley, Lee-Ann
Uplift and subsidence reveal a nonpersistent megathrust rupture boundary (Sitkinak Island, Alaska); 2014; Article; Journal; Geophysical Research Letters; Briggs, Richard W.; Engelhart, Simon E.; Nelson, Alan R.; Dura, Tina; Kemp, Andrew C.; Haeussler, Peter J.; Corbett, D. Reide; Angster, Stephen J.; Bradley, Lee-Ann

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Year Published: 2014

Comparison of smoothing methods for the development of a smoothed seismicity model for Alaska and the implications for seismic hazard

In anticipation of the update of the Alaska seismic hazard maps (ASHMs) by the U. S. Geological Survey, we report progress on the comparison of smoothed seismicity models developed using fixed and adaptive smoothing algorithms, and investigate the sensitivity of seismic hazard to the models. While fault-based sources, such as those for great...

Moschetti, Morgan P.; Mueller, Charles S.; Boyd, Oliver S.; Petersen, Mark D.
Comparison of smoothing methods for the development of a smoothed seismicity model for Alaska and the implications for seismic hazard; 2014; Conference publication; American Geophysical Union, Fall Meeting 2013; Moschetti, Morgan P.; Mueller, Charles S.; Boyd, Oliver S.; Petersen, Mark D.

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Year Published: 2013

Tackling “boundary faults” across the Alaska-Yukon border: a report from the field

One day in late May, a team of geologists from two countries and four different organizations got together in a remote corner of the Yukon Territory to try to rectify a mapping discrepancy called a “boundary fault.”

Saltus, Rick
Tackling “boundary faults” across the Alaska-Yukon border: a report from the field; 2013; Article; Journal; Earth; Saltus, Rick

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Year Published: 2013

Alaska Geochemical Database, Version 2.0 (AGDB2)--including “best value” data compilations for rock, sediment, soil, mineral, and concentrate sample media

The Alaska Geochemical Database Version 2.0 (AGDB2) contains new geochemical data compilations in which each geologic material sample has one “best value” determination for each analyzed species, greatly improving speed and efficiency of use. Like the Alaska Geochemical Database (AGDB, http://pubs.usgs.gov/ds/637/) before it, the AGDB2...

Granitto, Matthew; Schmidt, Jeanine M.; Shew, Nora B.; Gamble, Bruce M.; Labay, Keith A.

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Year Published: 2013

Geochemistry, petrography, and zircon U-Pb geochronology of Paleozoic metaigneous rocks in the Mount Veta area of east-central Alaska: implications for the evolution of the westernmost part of the Yukon-Tanana terrane

We report the results of new mapping, whole-rock major, minor, and trace-element geochemistry, and petrography for metaigneous rocks from the Mount Veta area in the westernmost part of the allochthonous Yukon–Tanana terrane (YTT) in east-central Alaska. These rocks include tonalitic mylonite gneiss and mafic metaigneous rocks from the Chicken...

Dusel-Bacon, Cynthia; Day, Warren C.; Aleinikoff, John N.
Geochemistry, petrography, and zircon U-Pb geochronology of Paleozoic metaigneous rocks in the Mount Veta area of east-central Alaska: implications for the evolution of the westernmost part of the Yukon-Tanana terrane; 2013; Article; Journal; Canadian Journal of Earth Sciences; Dusel-Bacon, Cynthia; Day, Warren C.; Aleinikoff, John N.

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Three polar bears chew on the plastic bollards and rope that were placed on the Arctic tundra.
September 7, 2019

Polar bear chew toys

The bollards and rope used to cordon-off survey equipment prove too tempting to curious polar bears on Barter Island, on the North Slope of Alaska.

Water chemistry measurements on the Alaska Peninsula
September 6, 2019

Hydrologist takes water chemistry measures on the Alaska Peninsula

Laura Hubbard of the USGS Upper Midwest Water Science Center takes water chemistry measures on the Alaska Peninsula as part of research to understand how long influenza viruses remain viable in the environment.  

Pacific walruses jousting with their tusks, Chukchi Sea, Alaska
September 3, 2019

Pacific walruses jousting with their tusks, Chukchi Sea, Alaska

Pacific walruses jousting with their tusks on the eastern shore of the Chukchi Sea (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Pacific walruses hauled out on beach, Alaska
September 3, 2019

Pacific walruses hauled out on beach, Alaska

Pacific walruses resting on the beach of the eastern shore of the Chukchi Sea (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Pacific walruses resting in the water, Chukchi Sea, Alaska
September 3, 2019

Pacific walruses resting in the water, Chukchi Sea, Alaska

Pacific walruses resting in the water on the eastern shore of the Chukchi Sea (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Pacific walruses jousting with their tusks, Alaska
September 3, 2019

Close up of Pacific walruses jousting with their tusks, Chukchi Sea

Pacific walruses jousting with their tusks on the eastern shore of the Chukchi Sea (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Pacific walruses hauled out on beach, Alaska
September 2, 2019

Pacific walruses hauled out on beach, Chukchi Sea, Alaska

Pacific walruses hauled out on the beach of the eastern shore of the Chukchi Sea (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Group of Pacific walruses resting on beach, Alaska
September 2, 2019

Group of Pacific walruses resting on beach, Chukchi Sea, Alaska

Pacific walruses resting on the beach of the eastern shore of the Chukchi Sea (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Solitary walrus calf with skin lesions resting on shore of the Chukchi Sea
September 2, 2019

Solitary walrus calf with skin lesions on beach, Chukchi Sea, Alaska

Solitary walrus calf with skin lesions resting on the eastern shore of the Chukchi Sea, Alaska (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Close up of solitary walrus calf with skin lesions, Alaska
September 2, 2019

Solitary walrus calf with skin lesions on shore, Chukchi Sea, Alaska

Solitary walrus calf with skin lesions resting on the eastern shore of the Chukchi Sea, Alaska (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

close up of Pacific walruses resting on the beach, Alaska
September 2, 2019

Pacific walruses resting on beach, Chukchi Sea

Pacific walruses resting on the beach of the eastern shore of the Chukchi Sea (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Pacific walruses resting on beach, Chukchi Sea, Alaska
September 2, 2019

Pacific walruses resting on beach, Chukchi Sea, Alaska

Pacific walruses resting on the beach of the eastern shore of the Chukchi Sea (Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-7.)

Filter Total Items: 256
Hydrologic Regions of Alaska
April 14, 2017

While freshwater ecosystems cover only a small amount of the land surface in Alaska, they transport and emit a significant amount of carbon, according to new U.S. Geological Survey research. An invited feature article for Ecological Applications provides the first-ever major aquatic carbon flux assessment for the entire state. Carbon flux refers to the rate of carbon transfer between pools.

Midnight Rainbow at Atigun Gorge, Alaska
April 10, 2017

Managing 72 million acres of Federal lands in Alaska is not easy, especially when the land’s many uses need to be balanced. There are several competing interests, including the development of mineral resources that are critical to the American economy.

Bogoslof Volcano, Alaska: ongoing eruption through the Bering Sea...
March 30, 2017

Hawai‘i is not the only island in the United States with an ongoing eruption involving hot lava and cold water.

Scientists taking soil samples
March 15, 2017

Alaska has considerable potential for undiscovered mineral resources, including critical minerals.

USGS
March 13, 2017

A new report by the USGS finds that although snow geese are increasing rapidly in northern Alaska, they are not having a negative effect on black brant. Brant are a goose species that shares its nesting habitat with snow geese.

Scientist collecting samples in the Arctic Coastal Plain
March 7, 2017

Despite recent changes to the growing season for plants in the Arctic, Alaska, caribou appear to have remained in sync with these changes over the last 30 years. 

Annotated aerial photo of crescent shaped island surrounded by open ocean.
March 3, 2017

Bogoslof volcano, located in the Aleutian Islands about 98 km (61 mi) northwest of Dutch Harbor/Unalaska, is in an active eruption sequence that began in mid-December 2016 and continues today.

A small bird with distinctive orange-brown feathers around its neck and blue feathers on head, sitting on a small shrub
March 2, 2017

Scientists can now predict which avian species are most sensitive to the increasingly dominant shrub habitat spreading across Alaska, a capability that will be useful for natural resource agencies in Alaska charged with managing these resources.

Image shows an undersea gas hydrate formation with shellfish on it.
February 9, 2017

A recent interpretive review of scientific literature performed by the U.S. Geological Survey and the University of Rochester sheds light on the interactions of gas hydrates and climate.

Dr. Christian Zimmerman, USGS Alaska Science Center Director
February 1, 2017

The U.S. Geological Survey is pleased to announce the selection of Dr. Christian Zimmerman as the new director of their Alaska Science Center in Anchorage, Alaska. Zimmerman succeeds Dr. Mark Shasby who held the position for the past six years.

USGS scientist placing a tracking collar on a caribou.
December 19, 2016

Caribou, North America’s wild reindeer, have lives apart from their famous role on Christmas Eve. Reindeer and caribou are large, cold-adapted, herding herbivores related to deer, elk and moose.

To learn more about how these arctic antler-bearers spend the other 364 days of the year, we talked to USGS caribou expert Dr. Layne Adams, who has studied these animals for more than 30 years.

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