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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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.

View Centers and Observatories

News

Date published: September 1, 2021

New Alaska Landbird Conservation Plan and Alaska Landbird Monitoring Survey Protocol

Alaska, where four major migratory flyways converge, hosts a diverse array of globally important avian habitats, ranging from towering rainforests to treeless tundra. USGS scientists recently led two teams of experts to produce key documents to help conserve Alaska’s similarly diverse landbird populations: the Alaska Landbird Conservation Plan and the Alaska Landbird Monitoring Survey Protocol...

Date published: August 16, 2021

Video of Rare Birds Breeding on St. Matthew Island, Alaska

A video produced by Andy Johnson with the Cornell Lab of Ornithology highlights collaborative research conducted on St. Matthew Island, in the Alaska Maritime National Wildlife Refuge. The video features research by the USGS Alaska Science Center and U.S. Fish and Wildlife Service Alaska in 2018 - 2019. The research team focused on surveying McKay's Bunting and the Pribilof Rock Sandpiper.

Date published: August 10, 2021

August is National Water Quality Month

The USGS monitors water quantity and quality on Alaska rivers to provide valuable up-to-date information for water resource planners, engineers, land and natural resource managers. This enables them to design infrastructure, manage floodplains, and protect life, property, and aquatic resources.

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Date published: September 16, 2021
Status: Active

Using Video Imagery to Study Wave Dynamics: Unalakleet

USGS scientists installed two video cameras atop a windmill tower in Unalakleet, Alaska, pointing westward over Norton Sound, to observe and quantify coastal processes such as wave run-up, development of rip channels, bluff erosion, and movement of sandbars and ice floes.

Date published: August 24, 2021
Status: Active

Climate impacts to Arctic coasts

The Arctic region is warming faster than anywhere else in the nation. Understanding the rates and causes of coastal change in Alaska is needed to identify and mitigate hazards that might affect people and animals that call Alaska home.

Date published: July 30, 2021
Status: Active

U.S. West Coast and Alaska Marine Geohazards

Marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. Such underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis.

Devastating earthquakes in Japan (2011) and Chile (2010) that spawned pan-oceanic tsunamis sent a sobering reminder that U.S. coastlines are also vulnerable to natural disasters that originate in...

Date published: June 23, 2021
Status: Active

Tracking Data for Whooper Swans (Cygnus cygnus)

Available here are tracking data for the whooper swan, a Eurasian species that closely resembles the trumpeter swan in North America. These data were collected to better understand the potential transmission of avian influenza viruses carried by swans and provide information on the migratory habits of whooper swans in East Asia.

Contacts: David Douglas
Date published: June 23, 2021
Status: Active

Tracking Data for Kittlitz's Murrelet (Brachyramphus brevirostris)

Available here are tracking data for the Kittlitz’s murrelet, a rare seabird species that nests solitarily on the ground in barren, often alpine areas near the North Pacific and Bering Sea. 

Date published: May 15, 2021
Status: Active

Alaska North Slope LiDAR

High-resolution light detection and ranging (lidar) elevation data were acquired along the north coast of Alaska between 2009 and 2012. The lidar acquisition, from Icy Cape, Alaska to the United States/Canadian border, comprised approximately 11,000 km2. The airborne lidar data were acquired in support of the U.S. Geological Survey Coastal and Marine Geology Program. The purpose of...

Date published: April 30, 2021
Status: Active

Tracking Data for Greater White-fronted Geese (Anser albifrons)

Available here are tracking data of Greater White-fronted Geese, a species that nests in coastal areas of western and northern Alaska and winters across a broad area of North America along the Pacific and Central flyways. These data were collected to better understand the timing and patterns of migratory movements and seasonal use of habitats in breeding, wintering, and migratory areas of...

Contacts: David Douglas
Date published: April 28, 2021
Status: Active

Tracking Data for Whimbrel (Numenius phaeopus)

Available here are tracking data for the whimbrel, a striking example of a shorebird with its long and curved bill. The whimbrel is found throughout tundra and boreal habitats of Alaska during the summer and spends the winter along coast lines of the continental U.S., and central and South America. These data were collected to better understand the migratory patterns of this iconic species....

Date published: April 16, 2021
Status: Active

Tracking Data for Emperor Geese (Anser canagicus)

Available here are tracking data for the Emperor Goose, an endemic waterfowl species to the Bering Sea region that breeds primarily in western Alaska on the Yukon-Kuskokwim Delta and spends the winter in southwestern Alaska and throughout the Aleutian Islands. These data were collected to better understand the migratory patterns, winter habitat use, and annual survival of emperor geese.

Date published: February 22, 2021
Status: Active

Barry Arm, Alaska Landslide and Tsunami Monitoring

A large steep slope in the Barry Arm fjord 30 miles (50 kilometers) northeast of Whittier, Alaska has the potential to fall into the water and generate a tsunami that could have devastating local effects on those who live, work, and recreate in and around Whittier and in northern Prince William Sound.

Date published: February 17, 2021
Status: Active

Suspended-Sediment and Solids Sampling

Suspended-sediment samples are collected on each visit at both gage and border site locations.

Date published: February 5, 2021
Status: Active

Pacific Marine Heatwave

The USGS conducts research on marine wildlife, habitats, and ecosystem processes to provide science to inform our partners as they make decisions relative to species status, resource use, and human activities. These studies examine impacts of severe heatwaves on marine ecosystems of the North Pacific. 

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Date published: September 13, 2021

Goose Migration and Egg Nutrient Allocation, Colville River Delta, Alaska, 2011-2015

These data are in nine tables relating to three species of arctic breeding geese studied on the Colville River Delta, Alaska, 2011-2014.

Date published: August 30, 2021

Temporal Viral Viability Data from Avian Influenza A Viruses Maintained in Alaska Wetlands Under Experimental and Environmental Conditions

Data sets containing: (1) sample collection and influenza A virus (IAV) screening information for wild ducks, (2) water temperature data from four wetlands within the Izembek National Wildlife Refuge in Alaska, USA (3) water quality measurement from four wetlands within the Izembek NWR in AK, USA, (4) genetic sequence data for IAVs recovered from replicate samples of wild ducks.

Date published: August 26, 2021

Walrus Haulout Outlines Apparent from Satellite Imagery Near Point Lay Alaska, Autumn 2018-2020

These data are in three folders of Keyhole Markup Language (KML) geospatial polygons representing the outlines of walrus herds apparent in satellite imagery. Each KML file contains one or more geospatial polygons of walrus herd outlines created by one observer who visually interpreted the images. The attribute values from all KML files are collected in a CSV table included with this data...

Date published: August 25, 2021

Innate Immunity and Stress and Reproductive Hormone Metrics for Southern Beaufort Sea Polar Bears, 2013-2015

These were data collected from polar bears from the Southern Beaufort Sea during the spring between 2013 and 2015. Data include individual id, demographic characteristics, year, status for the current and prior year regarding use of land, concentrations of stress response and reproductive hormones, blood-based biomarker measures indicative of fasting, body mass index, and body condition.

Date published: August 24, 2021

Blood Parasite Infection, Body Mass, and Survival Data from Emperor Geese (Anser canagicus), Yukon-Kuskokwim Delta, Alaska, 2006-2016

This dataset provides two tables of blood parasite infection data collected from Emperor Geese (Anser canagicus) on Yukon-Kuskokwim Delta, Alaska, 2006-2016. Three genera of blood parasites (Leucocytozoon, Haemoproteus, Plasmodium) were detected by molecular sequencing of a 479 bp fragment of the Cytochrome-b gene. 

Date published: August 18, 2021

Data on Blood Analytes and Post-Release Survival in Spectacled Eiders (Somateria fischeri), Northern Alaska, 2010-2011

These data are in one table of variables that potentially influenced the immediate post-release survival of spectacled eiders (Somateria fischeri) from the Colville River Delta, Alaska marked with coelomically implanted satellite transmitters with percutaneous antennae in 2010 and 2011.

Date published: July 26, 2021

Nearshore bathymetry of the Unalakleet River mouth, Alaska, 2019

Bathymetry offshore of the mouth of the Unalakleet River in Alaska.

Date published: July 23, 2021

Geochemical analyses of rock samples collected from the Dora Bay peralkaline igneous complex, Prince of Wales Island, southeastern Alaska

This data release presents the major and trace element chemistry of rock samples collected by the U.S. Geological Survey (USGS) from surface exposures of the Dora Bay igneous complex (DBIC), located in the southern part of Prince of Wales Island, southeastern Alaska. The DBIC represents a possible domestic source of HREE-enriched rare earth elements.

Date published: July 23, 2021

Geochemical analyses of rock samples collected from the Dotson and I and L rare earth element deposits of the Bokan Mountain peralkaline igneous complex, Prince of Wales Island, southeastern Alaska

This data release presents the major and trace element chemistry of rock samples collected by the U.S. Geological Survey (USGS) from trenches, channel cuts, test pits, and surface exposures of the Dotson and I and L Zone rare earth element deposits at Bokan Mountain, located in the southern part of Prince of Wales Island, southeastern Alaska.

Date published: July 14, 2021

Walrus Haulout Outlines and Count Data Apparent from Aerial Survey Images Collected Near Point Lay Alaska, Autumn 2018 and 2019

This dataset provides walrus haulout group outlines, systematic grids cast over the outlines, and digitized points at the centroids of the individual walruses identified inside a randomly selected subset of grid cells. These data are based on visual interpretation of unpublished imagery from 26 aerial surveys by an Unoccupied Aerial System (UAS) operated by the USGS ASC.

Date published: July 13, 2021

Cortisol Concentration Data from Polar Bear (Ursus maritimus) Hair Collected in the Bering, Chukchi, and Beaufort seas, Alaska, 1983-1989, 2004-2006, and 2008-2016

This data release contains one table which includes the concentration of cortisol from polar bear (Ursus maritimus) hair and morphometric data from some of the captured bears. We assayed concentration of cortisol in hair (HCC) from polar bears captured in the Alaska Beaufort, Bering and Chukchi seas during 1983–1989 and 2004–2016. 

Date published: July 12, 2021

Protein and Fat Consumption of Zoo Polar Bears in 14-day Ad Libitum Trials, 2019-2020

This is a single table containing measures of the amount of fat and meat consumed by 4 adult female and 5 adult male polar bears in U.S. zoos when provided both food sources ad libitum for 12-14 days. Trial length was intended to be 14 days, but trial dietary items ran out for two bears prior to the end of the trial (i.e., at 12 and 13 days instead of 14 days). 

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Arctic Boundaries as defined by the Arctic Research & Policy Act-ARPA Circumpolar Map
January 5, 2021

All US and Foreign territory north of the Arctic Circle and all US terrritory north and west of the boundary formed by the Porcupine, Yukon, and Kuskokwim Rivers; all contiguous seas including the Arctic Ocean and the Beaufort, Bering and Chukchi Seas, and the Aleutian chain.

Arctic Boundary as Defined by the Arctic Research and Policy Act-ARPA Alaska
January 5, 2021

All US and Foreign territory north of the Arctic Circle and all US terrritory north and west of the boundary formed by the Porcupine, Yukon, and Kuskokwim Rivers; all contiguous seas including the Arctic Ocean and the Beaufort, Bering and Chukchi Seas, and the Aleutian chain.

Arctic Research & Policy Act Region: Alaska
January 5, 2021

Region: Alaska.  All US and Foreign territory north of the Arctic Circle and all US terrritory north and west of the boundary formed by the Porcupine, Yukon, and Kuskokwim Rivers; all contiguous seas including the Arctic Ocean and the Beaufort, Bering and Chukchi Seas, and the Aleutian chain.

U.S. Geological Survey scientist walks on  a coastal bluff in Alaska.
January 4, 2021

Alaska's north coast has been home to indigenous communities for centuries. Changing coastlines threaten important infrastructure and historic sites that support indigenous communities. Changing coastlines also can potentially reduce habitat for Arctic wildlife, such as polar bears, shorebirds, and walruses. Oil- and gas-related development sites and U.S. Department of Defense installations 

The Alaska Geologic Map shows the generalized geology of the state, each color representing a different type or age of rock
December 5, 2017

This is an interactive version of the Alaska geologic map database which allows a user to view and access many features of the database and map through a standard web browser. In other words, there is no need for or knowledge of specialized GIS software.

Digital Elevation Model in the Atchafalaya Basin, LA
April 19, 2016

The 3DEP products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

Alaska Topographic Map Contours on Glacier
March 10, 2016

New US Topo maps for Alaska are being produced statewide, with digital 7.5 minute 1:25,000-scale maps providing a comprehensive update to the 15-minute 1:63,360-scale printed maps produced nearly fifty years ago. You can view a status map showing where the new maps are available, and link to a site to download the maps.

Image shows a road split due to earthquake damage
March 27, 2014

On March 27, 1964 the largest recorded earthquake in U.S. history struck southcentral Alaska.  Click on the photos or the numbers to take a tour.

Filter Total Items: 169
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Year Published: 2021

Assessment of barrier island morphological change in northern Alaska

Arctic barriers islands are highly dynamic features influenced by a variety of oceanographic, geologic, and environmental factors. Many Alaskan barrier islands and spits serve as habitat and protection for native species, as well as shelter the coast from waves and storms that cause flooding and degradation of coastal villages. This study...

Hamilton, Anna I.; Gibbs, Ann E.; Erikson, Li H.; Engelstad, Anita C.
Hamilton, A.I., Gibbs, A.E., Erikson, L.H., and Engelstad, A.C., 2021, Assessment of barrier island morphological change in northern Alaska: U.S. Geological Survey Open-File Report 2021–1074, 28 p., https://doi.org/10.3133/ofr20211074.

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Year Published: 2021

Preliminary assessment of the wave generating potential from landslides at Barry Arm, Prince William Sound, Alaska

We simulated the concurrent rapid motion of landslides on an unstable slope at Barry Arm, Alaska. Movement of landslides into the adjacent fjord displaced fjord water and generated a tsunami, which propagated out of Barry Arm. Rather than assuming an initial sea surface height, velocity, and location for the tsunami, we generated the tsunami...

Barnhart, Katherine R.; Jones, Ryan P.; George, David L.; Coe, Jeffrey A.; Staley, Dennis M.
Barnhart, K.R., Jones, R.P., George, D.L., Coe, J.A., and Staley, D.M., 2021, Preliminary assessment of the wave generating potential from landslides at Barry Arm, Prince William Sound, Alaska: U.S. Geological Survey Open-File Report 2021–1071, 28 p., https://doi.org/10.3133/ofr20211071.

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Year Published: 2021

Evaluation of remote mapping techniques for earthquake-triggered landslide inventories in an urban subarctic environment: A case study of the 2018 Anchorage, Alaska Earthquake

Earthquake-induced landslide inventories can be generated using field observations but doing so can be challenging if the affected landscape is large or inaccessible after an earthquake. Remote sensing data can be used to help overcome these limitations. The effectiveness of remotely sensed data to produce landslide inventories, however, is...

Martinez, Sabrina Nicole; Schaefer, Lauren Nicole; Allstadt, Kate; Thompson, Eric M.

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Year Published: 2021

Biogeography and ecology of Ostracoda in the U.S. northern Bering, Chukchi, and Beaufort Seas

Ostracoda (bivalved Crustacea) comprise a significant part of the benthic meiofauna in the Pacific-Arctic region, including more than 50 species, many with identifiable ecological tolerances. These species hold potential as useful indicators of past and future ecosystem changes. In this study, we examined benthic ostracodes from nearly 300 surface...

Gemery, Laura; Cronin, Thomas M.; Cooper, Lee W.; Dowsett, Harry J.; Grebmeier, Jacqueline M.

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Year Published: 2021

Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 1,407 billion (1.4 trillion) cubic feet of gas in conventional accumulations in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska.

Houseknecht, David W.; Mercier, Tracey J.; Schenk, Christopher J.; Moore, Thomas E.; Rouse, William A.; Dumoulin, Julie A.; Craddock, William H.; Lease, Richard O.; Botterell, Palma J.; Sanders, Margaret M.; Smith, Rebecca A.; Connors, Christopher D.; Garrity, Christopher P.; Whidden, Katherine J.; Gooley, Jared T.; Counts, John W.; Long, Joshua H.; DeVera, Christina A.
Houseknecht, D.W., Mercier, T.J., Schenk, C.J., Moore, T.E., Rouse, W.A., Dumoulin, J.A., Craddock, W.H., Lease, R.O., Botterell, P.J., Sanders, M.M., Smith, R.A., Connors, C.D., Garrity, C.P., Whidden, K.J., Gooley, J.T., Counts, J.W., Long, J.H., and DeVera, C.A., 2021, Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021: U.S. Geological Survey Fact Sheet 2021-3003, 4 p., https://doi.org/10.3133/fs20213003.

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Year Published: 2021

Dating fault damage along the eastern Denali fault zone with hematite (U-Th)/He thermochronometry

Unraveling complex slip histories in fault damage zones to understand relations among deformation, hydrothermal alteration, and surface uplift remains a challenge. The dextral eastern Denali fault zone (EDFZ; southwest Yukon, Canada) bounds the Kluane Ranges and hosts a variety of fault-related rocks, including hematite fault surfaces, which have...

McDermott, Robert G.; Ault, Alexis K.; Caine, Jonathan

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Year Published: 2021

Extreme Quaternary plate boundary exhumation and strike slip localized along the southern Fairweather fault, Alaska, USA

The Fairweather fault (southeastern Alaska, USA) is Earth’s fastest-slipping intracontinental strike-slip fault, but its long-term role in localizing Yakutat–(Pacific–)North America plate motion is poorly constrained. This plate boundary fault transitions northward from pure strike slip to transpression where it comes onshore and undergoes a <...

Lease, Richard O.; Haeussler, Peter; Witter, Robert C.; Stockli, Daniel F.; Bender, Adrian; Kelsey, Harvey; O'Sullivan, Paul

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Year Published: 2021

Tectonic and magmatic controls on the metallogenesis of porphyry deposits in Alaska

Porphyry Cu and Mo deposits and occurrences are found throughout Alaska; they formed episodically during repeated subduction and arc-continent collisions spanning the Silurian to Quaternary. Porphyry systems occur in continental-margin and island arcs, which are broadly grouped into pre-accretionary or post-accretionary arcs. Pre-Mesozoic...

Kreiner, Douglas C.; Jones, James V.; Kelley, Karen D.; Graham, Garth E.

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Year Published: 2021

USGS permafrost research determines the risks of permafrost thaw to biologic and hydrologic resources

The U.S. Geological Survey (USGS), in collaboration with university, Federal, Tribal, and independent partners, conducts fundamental research on the distribution, vulnerability, and importance of permafrost in arctic and boreal ecosystems. Scientists, land managers, and policy makers use USGS data to help make decisions for development, wildlife...

Waldrop, Mark P.; Anderson, Lesleigh; Dornblaser, Mark; Erikson, Li H.; Gibbs, Ann E.; Herman-Mercer, Nicole M.; James, Stephanie R.; Jones, Miriam C.; Koch, Joshua C.; Leewis, Mary-Cathrine; Manies, Kristen L.; Minsley, Burke J.; Pastick, Neal J.; Patil, Vijay; Urban, Frank; Walvoord, Michelle A.; Wickland, Kimberly P.; Zimmerman, Christian
Waldrop, M.P., Anderson, L., Dornblaser, M., Erikson, L.H., Gibbs, A.E., Herman-Mercer, N.M., James, S.R., Jones, M.C., Koch, J.C., Leewis, M.-C., Manies, K.L., Minsley, B.J., Pastick, N.J., Patil, V., Urban, F., Walvoord, M.A., Wickland, K.P., and Zimmerman, C., 2021, USGS permafrost research determines the risks of permafrost thaw to biologic and hydrologic resources: U.S. Geological Survey Fact Sheet 2020-3058, 6 p., https://doi.org/10.3133/fs20203058.

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Year Published: 2021

Geochemistry of coastal permafrost and erosion-driven organic matter fluxes to the Beaufort Sea near Drew Point, Alaska

Accelerating erosion of the Alaska Beaufort Sea coast is increasing inputs of organic matter from land to the Arctic Ocean, and improved estimates of organic matter stocks in eroding coastal permafrost are needed to assess their mobilization rates under contemporary conditions. We collected three permafrost cores (4.5–7.5 m long) along a...

Bristol, Emily M.; Connolly, Craig T.; Lorenson, Thomas; Richmond, Bruce M.; Ilgen, Anastasia G.; Choens, Charles R.; Bull, Diana L.; Kanevskiy, Mikhail Z.; Iwahana, Go; Jones, Benjamin M.; McClelland, James M.

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Year Published: 2021

The Alaska convergent margin backstop splay fault zone, a potential large tsunami generator between the frontal prism and continental framework

The giant tsunami that swept the Pacific from Alaska to Antarctica in 1946 was generated along one of three Alaska Trench instrumentally recorded aftershock areas following great and giant earthquakes. Aftershock areas were investigated during the past decade with multibeam bathymetry, ocean bottom seismograph wide‐angle seismic, reprocessed...

von Huene, Roland; Miller, John J.; Krabbenhoeft, Anne

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Year Published: 2021

Hydrogeochemistry in the Yukon-Tanana Upland region of east-central Alaska: Possible exploration tool for porphyry-style deposits

A hydrogeochemical study using high resolution ICP-MS was undertaken at the Taurus and other porphyry Cu-Mo(-Au) occurrences and Ag-Au-Cu (+/- Pb, Zn) occurrences with epithermal-style characteristics in the Yukon-Tanana upland region of eastern Alaska. Surface water samples were collected from 30 sites on creeks that drain known deposits and...

Kelley, Karen D.; Graham, Garth E.

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Eggs in a nest on the ground
March 10, 2021

This R script will run one replicate of one scenario used by Weiser (in review) to quantify biases in estimates of nest survival when nests are not found at the beginning of the nesting interval (age 0). The script simulates nest monitoring histories based on input parameters, applies models with or without an age effect to estimate daily survival rates, and calculates nest survival (to the end of

Shorebird on the tundra on the north slope of Alaska
March 16, 2020

This R script will run one example of the stochastic matrix models run by Weiser et al. (2020) to simulate shorebird populations. The model predicts population growth rates and elasticity values of vital rates. The example script is stand-alone and contains input values for one example species; input values for the other species are provided in the manuscript.

A DNA strand illustration
August 6, 2018

Bioinformatics software repository containing python scripts intended for search and download of genetic information obtained from GenBank NCBI genetics data resources in support of developing PCR primers, targeted genetic databases, genetic analyses, and data interpretation. Includes multiple functions to streamline this process.

Sea ice in the Chukchi Sea
July 25, 2017

Daily sea ice imagery and charting benefits logistics and navigational planning in the Alaskan Arctic waters, yet access to these data often requires high bandwidth data access and substantial GIS processing.

USGS
June 20, 2017

Cormack-Jolly-Seber (CJS) mark-recapture models are widely utilized in ecology, providing estimates of vital rates and abundance that are difficult to obtain using other means.

Polar bear still hunting at a seal breathing hole
June 20, 2017

Quantitative fatty acid signature analysis (QFASA; Iverson et al. 2004) has become a common method of estimating diet composition, especially for marine mammals, but the performance of the method has received limited investigation.

multicolored map of Ocean Shores, Washington
April 13, 2017

The Pedestrian Evacuation Analyst is an ArcGIS extension that estimates how long it would take for someone to travel on foot out of a hazardous area that was threatened by a sudden event such as a tsunami, flash flood, or volcanic lahar. It takes into account the elevation changes and the different types of landcover that a person would encounter along the way.

Kasilof coho salmon with radio tag antenna in it's mouth
January 10, 2017

Quantitative fatty acid signature analysis (QFASA) is a method of diet estimation introduced over a decade ago (Iverson et al. 2004). 

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Outstanding in the Field - Episode 8 artwork
August 17, 2021

USGS Outstanding in the Field, Episode 8, Braving thin ice

This is the first in a special edition of Outstanding in the Field, the U.S. Geological Survey’s podcast series produced by the Ecosystems Mission Area. In this series we will be highlighting stories from the Alaska Voices podcast, a partnership between the U.S. Geological Survey’s Alaska Climate Adaptation Science Center and the University of Alaska Fairbanks.

Three geologists looking at igneous textures in granitic rocks hosting gold
August 5, 2021

Three geologists looking at igneous textures in granitic rocks

Alaska Science Center geologist Doug Kreiner and University of Alaska, Fairbanks professor Sean Regan look at igneous textures in granitic rocks hosting gold at the Pogo gold mine with Pogo exploration geologists. This is a new collaborative study with USGS, UAF and Pogo Mine, to collaborate on unraveling the genesis of Pogo, an important producer of gold in Alaska with

...
Geologists discuss the district-scale geology during a field visit at Pogo Mine, Alaska
August 5, 2021

Geologists discuss the district-scale geology at Pogo Mine, Alaska

Alaska Science Center geologist Doug Kreiner and University of Alaska, Fairbanks professor Sean Regan discuss the district-scale geology with the chief exploration geologist at Pogo Mine. This is a new collaborative study with USGS, UAF and Pogo Mine, to collaborate on unraveling the genesis of Pogo, an important producer of gold in Alaska with critical mineral enrichments

...
July 28, 2021

Updating NHD Infrastructure with Elevation Derived Hydrography—Alaska

Topic: Building the infrastructure for updating the National Hydrography Datasets with Elevation-Derived Hydrography – Alaska leads the way

Presenters: Steve Aichele, Geographer, USGS User Engagement Hydrography Focus Area Lead, and Amanda Lowe, Supervisory Geographer, USGS Topographic Applied Research Section Chief

April 26, 2021

EarthShots — Satellite Images of Environmental Change

The US Geological Survey's Earth Resources Observation and Science Center, or "EROS" archive’s data from the LandSat satellites which have been in operation from 1972 to the present day. EarthShots presents environmental changes using Landsat images. 
 

April 22, 2021

We are the Coastal and Marine Hazards and Resources Program (AD)

We are the USGS Coastal and Marine Hazards and Resources Program. Our mission is to provide science for sustainable stewardship of Earth’s precious resources. We conduct research, quantify resources, work to understand ecosystems, and develop tools to ensure our Nation has the best information to manage resources and prepare for

April 22, 2021

We are the Coastal and Marine Hazards and Resources Program

We are the USGS Coastal and Marine Hazards and Resources Program. Our mission is to provide science for sustainable stewardship of Earth’s precious resources. We conduct research, quantify resources, work to understand ecosystems, and develop tools to ensure our Nation has the best information to manage resources and prepare for

March 19, 2021

Earth As Art 1

The Earth As Art project began in the early 2000s, and its original intent remains the same: to produce images that do not look like satellite images at first glance. Earth As Art shows not only what satellites capture in the visible wavelengths of light you and I can see, but also what’s hiding in the invisible wavelengths that Landsat sensors can detect in the infrared

March 19, 2021

Earth As Art 1 (AD)

The Earth As Art project began in the early 2000s, and its original intent remains the same: to produce images that do not look like satellite images at first glance. Earth As Art shows not only what satellites capture in the visible wavelengths of light you and I can see, but also what’s hiding in the invisible wavelengths that Landsat sensors can detect in the infrared

Icy Alsek River in winter
February 26, 2021

Icy Alsek River in winter

Randy Host preparing to sample discharge and collect water quality samples on an icy Alsek River in winter.

Alsek River Layout
February 17, 2021

Alsek River Layout

Illustration detailing the Alsek River layout.  Visit USGS Transboundary River Monitoring in Southeast Alaska for more information about our research.

Salmon River Layout
February 17, 2021

Salmon River Layout

Illustration detailing the Salmon River layout.  Visit USGS Transboundary River Monitoring in Southeast Alaska for more information about our research.

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A sparrow in the grass
September 1, 2021

Alaska, where four major migratory flyways converge, hosts a diverse array of globally important avian habitats, ranging from towering rainforests to treeless tundra. USGS scientists recently led two teams of experts to produce key documents to help conserve Alaska’s similarly diverse landbird populations: the Alaska Landbird Conservation Plan and the Alaska Landbird Monitoring Survey Protocol.

Female McKay's Bunting with berry stained feathers on St. Matthew Island, Alaska
August 16, 2021

A video produced by Andy Johnson with the Cornell Lab of Ornithology highlights collaborative research conducted on St. Matthew Island, in the Alaska Maritime National Wildlife Refuge. The video features research by the USGS Alaska Science Center and U.S. Fish and Wildlife Service Alaska in 2018 - 2019. The research team focused on surveying McKay's Bunting and the Pribilof Rock Sandpiper.

USGS boat on bank of Stikine River, Alaska
August 10, 2021

The USGS monitors water quantity and quality on Alaska rivers to provide valuable up-to-date information for water resource planners, engineers, land and natural resource managers. This enables them to design infrastructure, manage floodplains, and protect life, property, and aquatic resources.

THUMBNAIL: Timelapse of City/Town Halls in AK
August 3, 2021

Summary statistics are now available for this challenge. Thanks again to everyone who contributed!

Thawing Permafrost
August 2, 2021

Newly published research indicates permafrost, or seasonally frozen, soils may be an overlooked source of greenhouse gases (GHG) prior to complete thaw, which could have implications for how thawing of this thick subsurface layer of soil will impact the global carbon budget and how future climate conditions are studied.  

  

TNMCorps Mapping Challenge: City/Town Halls in AK FINISHED
July 29, 2021

This challenge is now complete! Thank you to everyone who contributed!

TNMCorps Mapping Challenge: City/Town Halls in AK
July 22, 2021

This challenge is SO CLOSEThere's just a few remaining points that need to be confirmed. 

Photograph looking across a large body of calm water surrounded by mountains with a glacier and snow-capped peaks in distance.
July 21, 2021

USGS researchers in Alaska, including geologist and Mendenhall Fellow Drake Singleton of the Pacific Coastal and Marine Science Center, are using techniques from a discipline known as lake paleoseismology, studying cores of lake sediment to reconstruct past seismic activity. 

Image: Rainbow Over Yukon River, Eagle, Alaska, June 2002
July 21, 2021

We hope you enjoy and subscribe. Below are links to recent publications, data releases, and highlights of on-going research programs. In this issue, we feature Wildfire Research, our Research Landscape Ecologist, a Geology publication on prospectivity for lode gold, and video about USGS Seabird Research. See new additions to our Data & Tools and Publications pages. 

TNMCorps Mapping Challenge: City/Town Halls in AK
July 15, 2021

Volunteers continue to make progress on this challenge! See our spatial analysis for tips on which communities may still need to be collected.

TNMCorps Mapping Challenge: City/Town Halls in AK
July 8, 2021

More and more points are coming in! Keep up the good work!

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