Unified Interior Regions

Alaska

The Alaska Region represents a resource-rich, dynamic landscape shaped by volcanos, earthquakes, major rivers, and glaciers. Here, we conduct research to inform management of Alaska’s extensive natural resources, inform national Arctic energy policy, and provide scientific information to help others understand, respond to, and mitigate impacts from natural hazards.

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Filter Total Items: 199
Date published: October 9, 2018
Status: Active

Alaska Seismic Hazard Map

The National Seismic Hazard Maps developed by the USGS show the spatial probability of peak earthquake-driven ground motion levels. Since the last revisions to the map for Alaska in 2007, scientists have made significant advances in understanding active faulting, fault slip rates, and fault behavior.

Date published: October 9, 2018
Status: Active

Alaska-Aleutian Subduction Zone Studies

Our research team is exploring seismic and aseismic slip along the Alaska-Aleutian arc and studying the prehistoric record of megathrust earthquakes and tsunamis along the Alaska-Aleutian subduction zone

Seismic and Aseismic Slip: Tectonic tremor and associated slow slip events represent a newly discovered part of the earthquake cycle. This research aims to...

Date published: October 9, 2018
Status: Active

Characterizing the Active Queen Charlotte-Fairweather Fault System

This research aims to better characterize the earthquake potential of the southern Fairweather Fault in order to provide more accurate fault source data for the USGS National Seismic Hazard Map. Our approach interrogates lidar data and satellite imagery, applies paleoseismological methods to examine earthquake history, and leverages partnerships with USGS scientists from Colorado and...

Date published: September 22, 2018
Status: Active

Monitoring and Research Boreal Partners in Flight Projects

Boreal Partners in Flight has five major regional projects designed to monitor broad-scale trends in populations of landbirds. There are also many projects throughout Alaska that address specific research questions or local monitoring needs.

Date published: September 21, 2018
Status: Active

Alaska Landbird Monitoring Survey

Alaska provides breeding habitats for 135 species of landbirds, half of which breed predominantly north of the U.S.-Canada border. The road-based North American Breeding Bird Survey (BBS) provides some data on population trends in Alaska but most northern species are inadequately monitored because of a paucity of roads. Boreal Partners in Flight thus developed the Alaska Landbird Monitoring...

Date published: September 18, 2018
Status: Active

Festivals Celebrating Birds in Alaska

Here are a few festivals celebrating birds around the state of Alaska.

Date published: September 17, 2018
Status: Active

Meeting and Project Summaries for Boreal Partners in Flight

Information on topics discussed by Boreal Partners in Flight (BPIF) working groups organized by year.

Date published: August 21, 2018
Status: Active

Background of Beak Deformity Research

Large numbers of Black-capped Chickadees with abnormal beaks were reported in south-central Alaska in the late 1990s.  More recently, similar beak deformities have appeared in other species throughout the state. At least 30 Alaskan bird species are affected and the geographic extent of the problem appears to be growing.  In addition to Alaskan observations, we have received increasing numbers...

Date published: August 21, 2018
Status: Active

Antibiotic Resistant Bacteria in Migratory Birds

Migratory birds, and particularly those using habitats close to human settlements, may be infected with antibiotic resistant bacteria.  The USGS is working with public health professionals to understand the role of birds in the maintenance and dispersal of antibiotic resistant bacteria.  Additionally, the USGS is investigating how antibiotic resistant bacteria in birds may relate to public and...

Date published: August 20, 2018
Status: Active

Wetlands in the Quaternary Project

Wetlands accumulate organic-rich sediment or peat stratigraphically, making them great archives of past environmental change. Wetlands also act as hydrologic buffers on the landscape and are important to global biogeochemical cycling. This project uses wetland archives from a range of environments to better understand how vegetation, hydrology, and hydroclimate has changed on decadal to multi-...

Date published: August 20, 2018
Status: Active

Species Affected by Beak Deformities

At least 30 Alaskan bird species are affected and the geographic extent of the problem appears to be growing.  In addition to Alaskan observations, we have received increasing numbers of reports from other parts of North America and Europe.

Date published: August 19, 2018
Status: Active

Physical Description of Beak Deformities

The most commonly observed physical abnormalities among Alaskan birds are overgrown or crossed beaks.  The severity of the deformities varies, ranging from a nearly indiscernible “overbite” to beaks that are more than double their normal length.  The upper and lower parts of the beak are also frequently crossed or gapped.

Filter Total Items: 173
Date published: September 18, 2019

Argos Satellite Tracking Data for Northern Pintails (Anas acuta) - Raw Data

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 129 satellite transmitters attached to Northern Pintail ducks on their winter range in Japan, 2007-2009. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content

Date published: September 18, 2019

Argos Satellite Tracking Data for Northern Pintails (Anas acuta) - Processed Data

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 129 satellite transmitters attached to Northern Pintail ducks on their winter range in Japan, 2007-2009. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor

Date published: September 18, 2019

Argos Satellite Tracking Data for Blue-winged Teal (Anas discors) - Raw Data

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 42 satellite transmitters attached to Blue-winged Teal ducks on their breeding range in Saskatchewan and Alberta (August 2013) and spring staging areas in Texas and Louisiana (March 2015). Five data files are included

Date published: September 18, 2019

Argos Satellite Tracking Data for Blue-winged Teal (Anas discors) - Processed Data

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 42 satellite transmitters attached to Blue-winged Teal ducks on their breeding range in Saskatchewan and Alberta (August 2013) and spring staging areas in Texas and Louisiana (March 2015). The raw data were proce

Date published: September 10, 2019

USGS National and Global Oil and Gas Assessment Project-Northern Alaska Province, Gas Hydrate Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered gas hydrate resources on the north slope of Alaska. The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum...

Date published: September 5, 2019

Measurements Used to Determine the Sex of Bristle-thighed Curlews (Numenius tahitiensis)

This data set contains bill and tarsal measurements from 114 Bristle-thighed Curlews, captured on breeding grounds in Alaska, and non-breeding areas in Hawaii and Reitoru atoll, French Polynesia.

Date published: September 5, 2019

U-Pb detrital zircon geochronology of cores and cuttings from selected wells in Arctic Alaska

Select samples were collected from boreholes in Arctic Alaska to determine the U-Pb ages of zircon to determine a maximum depositional age of the geologic units and/or provenance of the zircon in the samples. Samples were collected from the Department of Natural Resources-Alaska Geologic Materials Center in Anchorage Alaska and sent to U.S. Geological Survey-Geology, Geophysics and Geochemist...

Date published: September 5, 2019

Geodetic Data for USGS Benchmark Glaciers: Orthophotos, Digital Elevation Models, and Glacier Boundaries

Since the late 1950s, the USGS has maintained a long-term glacier mass-balance program at three North American glaciers. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. Additional measurements have been made on Lemon Creek Glacier, AK to compliment data collected by the Juneau Ice

Date published: September 4, 2019

Aerial Imagery Captured at Nesting Pacific Black Brant (Branta bernicla nigricans) Colonies on the Yukon-Kuskokwim Delta, Alaska, 1993-2016

This data set contains one table of the habitat classifications from imagery captured during aerial photographic surveys at the five primary Pacific black brant colonies on the Yukon-Kuskokwim Delta in western Alaska from 1993-2016.

Date published: September 1, 2019

Alaska Geochemical Database Version 3.0 (AGDB3) including best value data compilations for rock, sediment, soil, mineral, and concentrate sample media

The Alaska Geochemical Database Version 3.0 (AGDB3) 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 Version 2.0 before it, the AGDB3 was created and designed to compile and integrate geochemical data from Alaska t

Date published: August 29, 2019

Geodetic Data for Juneau Icefield Glaciers: Orthophotos, Digital Elevation Models, and Glacier Boundaries

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

Date published: August 15, 2019

Carbon Isotope Concentrations in Stream Food Webs of the Arctic Network National Parks, Alaska, 2014-2016

This dataset includes information on the carbon samples that were collected from organic and mineral soils, streams, algae, invertebrates, and fish in the Arctic Network Parks.

Filter Total Items: 135
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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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Year Published: 2011

Quantifying the influence of sea ice on ocean microseism using observations from the Bering Sea, Alaska

Microseism is potentially affected by all processes that alter ocean wave heights. Because strong sea ice prevents large ocean waves from forming, sea ice can therefore significantly affect microseism amplitudes. Here we show that this link between sea ice and microseism is not only a robust one but can be quantified. In particular, we show that...

Tsai, Victor C.; McNamara, Daniel E.
Quantifying the influence of sea ice on ocean microseism using observations from the Bering Sea, Alaska; 2011; Article; Journal; Geophysical Research Letters; Tsai, Victor C.; McNamara, Daniel E.

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Year Published: 2011

Geomagnetic referencing in the arctic environment

Geomagnetic referencing is becoming an increasingly attractive alternative to north-seeking gyroscopic surveys to achieve the precise wellbore positioning essential for success in today's complex drilling programs. However, the greater magnitude of variations in the geomagnetic environment at higher latitudes makes the application of geomagnetic...

Podjono, Benny; Beck, Nathan; Buchanan, Andrew; Brink, Jason; Longo, Joseph; Finn, Carol A.; Worthington, E. William
Geomagnetic referencing in the arctic environment; 2011; Conference publication; Podjono, Benny ; Beck, Nathan ; Buchanan, Andrew ; Brink, Jason ; Longo, Joseph ; Finn, Carol A.; Worthington, E. William

Filter Total Items: 1,075
adult female Pacific walrus resting on the beach, Chukchi Sea, Alaska
August 21, 2019

Adult female Pacific walrus resting on beach, Chukchi Sea, Alaska

An adult female Pacific walrus 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.)

Young male Pacific walrus on beach along the Chukchi Sea
August 21, 2019

Young male Pacific walrus on beach of eastern shore of the Chukchi Sea

A young male Pacific walrus moving up 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.)

August 18, 2019

Time-lapse video of bluff erosion on Barter Island, Alaska

Recorded June 1, 2019 - August 18, 2019: Video shows a series of photos taken every hour during daylight hours in the summer of 2019. The camera looks westward along the coastal bluffs of Barter Island, located on Alaska’s North Slope. A pole on the bluff, visible in the first half of the video, once supported another video camera that was aimed at the

Measuring temperature and dissolved oxygen in impounded water of beaver dam on the Wrench Creek, Noatak National Preserve
August 17, 2019

Measuring temperature and dissolved oxygen in impounded water

Measuring temperature and dissolved oxygen in impounded water of beaver dam on the Wrench Creek, Noatak National Preserve.

 

Arctic grayling (Thymallus arcticus) and Dolly varden (Salvelinus malma)  from impounded water of beaver dam on the Wrench Creek
August 17, 2019

Arctic grayling and Dolly varden from impounded water of beaver dam

Arctic grayling (Thymallus arcticus) and Dolly varden (Salvelinus malma)  from impounded water of beaver dam on the Wrench Creek, Noatak National Preserve. 

Gnawed tree from beaver activity on tributary of the Agashashok River, Noatak National Preserve
August 16, 2019

Gnawed tree from beaver activity on tributary of the Agashashok River

Gnawed tree from beaver activity on tributary of the Agashashok River, Noatak National Preserve

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument
August 15, 2019

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Beaver dam crossing mainstem of Rabbit Creek near the headwaters, Cape Krusenstern National Monument
August 15, 2019

Beaver dam crossing mainstem of Rabbit Creek near the headwaters

Beaver dam crossing mainstem of Rabbit Creek near the headwaters, Cape Krusenstern National Monument

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument
August 14, 2019

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Measuring the amount of water impounded by a beaver dam on Rabbit Creek, Cape Krusenstern National Monument.
August 14, 2019

Measuring the amount of water impounded by a beaver dam

 

Measuring the amount of water impounded by a beaver dam on Rabbit Creek, Cape Krusenstern National Monument. 

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument
August 14, 2019

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Beaver swimming near dam on Rabbit Creek, Cape Krusenstern National Monument
August 14, 2019

Beaver swimming near dam on Rabbit Creek, Cape Krusenstern

Beaver swimming near dam on Rabbit Creek, Cape Krusenstern National Monument

Filter Total Items: 273
Arctic Cod
August 8, 2016

Information relating to fish biology, locations and effects of climate change will help guide future research and management decisions

Issue4.6June2016Thumb
July 8, 2016

New USGS and NOAA Collaboration in Alaska Will Help Gain Insight into Juvenile Chinook Salmon Distributions and Migrations

USGS
July 7, 2016

Alaska is a major producer of base and precious metals and has a high potential for additional undiscovered mineral resources. However, discovery is hindered by Alaska’s vast size, remoteness and rugged terrain. New methods are needed to overcome these obstacles in order to evaluate Alaska’s geology and mineral resource potential.

Female and her cub-of-the-year
June 29, 2016

“The scenarios predicted by our models are encouraging in that there are clear actions that humans can take to improve the chances that healthy polar bear populations persist in the future.” - Todd Atwood, USGS

Painting - Denali in Midsummer
June 21, 2016

The U.S. Geological Survey has produced a new compilation of landscape-scale sediment and soil geochemical data for Alaska. This was last completed nearly 40 years ago in 1978, but the new effort uses modern modeling and analysis techniques to map 68 elements across a newly developed and updated geochemical atlas of Alaska.

USGS study of fires and waterfowl surveys in the western boreal forest of North America. 
June 21, 2016

“These results suggest that waterfowl populations in the western boreal forest are resilient to forest fires and that current policies of limited fire suppression have not been detrimental to waterfowl populations." – Tyler Lewis, U.S. Geological Survey.

Permafrost area, Beaver Creek, Alaska.
June 20, 2016

The thawing of the planet’s permafrost is replumbing arctic environments, creating several hydrologic consequences and possibly some opportunities according to a new study published in Vadose Zone.

Tyndall Glacier, Alaska
June 14, 2016

On October 17, 2015, a rain-soaked mountainside slid into Taan Fiord on Icy Bay, sending a giant wave more than 500 feet up the opposite slope.

Scientist laying cable in a field
June 1, 2016

Fate of Alaska's large carbon reserves could affect greenhouse gas concentration.