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: 203
Date published: November 29, 2019
Status: Active

Assessment of Gas Hydrate Resources in the North Slope of Alaska, 2018

The U.S. Geological Survey (USGS) has updated the previous 2008 assessment of undiscovered, technically recoverable gas hydrate resources beneath the North Slope of Alaska.  This new 2018 assessment again indicates the existence of technically recoverable gas hydrate resources―that is, resources that can be discovered, developed, and produced using current technology.  Using a geology-based...

Date published: November 27, 2019
Status: Active

Alaska North Slope 2018 Hydrate 01 Stratigraphic Test Well

The National Energy Technology Laboratory (NETL), the Japan Oil, Gas and Metals National Corporation (JOGMEC), and the U.S. Geological Survey (USGS) are leading an effort to conduct an extended gas hydrate production test in northern Alaska.

Date published: November 5, 2019
Status: Active

M7.1 November 30, 2018 Anchorage Earthquake

A magnitude 7.1 earthquake struck north of Anchorage, Alaska, on November 30, 2018, at 8:29 a.m. local time (17:29:28 UTC). 

Date published: November 1, 2019
Status: Active

Swan Research

USGS research on swans in Alaska has focused on pathogens, contaminants, and demographic rates in each of the different breeding areas of Alaska. The vastly different migration patterns of swans in Alaska means that there are multiple factors on the wintering grounds and during migration that may influence population size and trends.

Date published: October 27, 2019
Status: Active

Sitka, AK

Recent Conditions

Instruments are used to monitor and detect changes in local conditions, including:

Date published: October 23, 2019
Status: Active

Alaska

Probabilistic seismic hazard maps have been prepared for Alaska portraying ground motion values (peak ground acceleration and spectral amplitude at periods of 0.2, 0.3 and 1.0 seconds) at probabilities of exceedance of 2% and 10% in 50 years. Preparation of these maps followed the same general strategy as that followed for the U.S.G.S. seismic hazard maps of the contiguous United States,...

Date published: October 17, 2019
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: October 16, 2019
Status: Active

Beavers Impacting Tundra Ecosystems (BITE)

The range expansion of the North American beaver (Castor canadensis) has implications for water quality, aquatic ecosystems, and fisheries in Arctic streams.

Contacts: Michael P Carey, Ph.D., Joshua C Koch, Ph.D., Brett A Poulin, PhD, Jonathan O’Donnell, PhD, Ken Tape, PhD
Date published: October 7, 2019
Status: Active

Community Outreach and Engagement

It is critically important that Alaska Native, rural communities and tribal organizations and Alaska co-management councils are kept informed of USGS research activities and findings. Involvement of and collaboration with students also provides valuable perspectives to USGS science. This page offers information on how USGS communicates its activities and seeks opportunities to gain important...

Date published: September 25, 2019
Status: Active

Alaska Earth Mapping Resources Initiative (Earth MRI)

Our objective is to provide a strategic framework for planning, coordination, and execution of the USGS Earth Mapping Resources Initiative (Earth MRI) in Alaska. Earth MRI aims to improve knowledge of the U.S. geologic framework through new geological and geophysical mapping and to identify areas that have the potential to contain undiscovered critical mineral resources.

Date published: September 11, 2019
Status: Active

Seabird Die-offs in Alaska

Beginning in 2015, large numbers of dead seabirds have been appearing on beaches in most marine areas of Alaska. Although seabird die-offs are known to occur sporadically (e.g. 1970, 1989, 1993, 1997/1998, and 2004) in Alaska, these recent die-offs have been distinguished from past events by their increased frequency, duration, geographic extent, and number of different species involved. 

Date published: September 9, 2019
Status: Active

Tracking Data for Blue-winged Teal (Anas discors)

Available here are tracking data of Blue-winged Teal, a duck species that breeds throughout much of North America and whose wintering range includes neotropical areas of the Caribbean and Central and South America, thus providing a migratory link between the continents of North and South America. These data were collected to better understand the timing and patterns of migratory movement of...

Filter Total Items: 200
Date published: August 11, 2020

Geomorphic Surface Boundaries for the Lower 7.5 Kilometers of the Taiya River Valley, Alaska, 2018

The USGS mapped geomorphic features in the lower 7.5 kilometers of the Taiya River valley bottom in and near Klondike Gold Rush National Historical Park near Skagway, Alaska. This dataset presents delineations of geomorphic surfaces. Geomorphic surface boundaries were prepared from 2003 lidar elevation data and updated using 2017 and 2018 aerial orthophotographs at eroding riverbanks, such th...

Date published: August 10, 2020

Descriptions, Depth to Refusal, and Field-Saturated Hydraulic Conductivity of Soils on the Arctic Coastal Plain of Alaska, 2012-2016

This dataset includes soil data collected from various landscapes adjacent to thaw ponds on the North Slope of Alaska between 2012 and 2018. The landscapes include ice-rich polygonal ground found on basin uplands, as well as bluffs and lake edges. At each site a visual description of soil type and texture was performed, and a permafrost probe was used to determine a 'depth to refusal'. G

Date published: July 31, 2020

Measurement Data of Polar Bears Captured in the Chukchi and Southern Beaufort Seas, 1981-2017

This dataset includes measures collected on polar bears captured in the Chukchi and Beaufort Seas, 1981-2017 by the U.S. Geological Survey and U.S. Fish and Wildlife Service. Data collected include body length, body mass, axillary girth, skull width and tail lengths. Bears were also aged as described in the methods. For some bears, an adipose tissue sample was collected and percent lip

Date published: July 29, 2020

Argos Satellite Tracking Data for Spectacled Eiders (Somateria fischeri) - 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 217 satellite transmitters attached to Spectacled Eiders on their breeding range in arctic and western Alaska and northeastern Russia, 1993-2011. The raw data were processed to accomplish two goals: flag implausible

Date published: July 29, 2020

Argos Satellite Tracking Data for Spectacled Eiders (Somateria fischeri) - 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 217 satellite transmitters attached to Spectacled Eiders on their breeding range in arctic and western Alaska and northeastern Russia, 1993-2011. Five data files are included in the "rawData" folder of this data package.

Date published: July 28, 2020

Genomic Data from Ptarmigan and Grouse, Alaska, 2015-2019

This data set provides sample data and NCBI accession information for genomic sequencing of ptarmigan and grouse from Alaska.

Date published: July 21, 2020

U-Pb Isotopic Data and Ages of Zircon and Titanite from Rocks from the Western Alaska Range, Northern Aleutian Range, Taylor Mountains, and Tikchik Mountains Regions, Alaska

This data set contains U-Pb isotopic data and ages of zircon
and titanite from igneous and metamorphic rocks collected
from the western Alaska and northern Aleutian Range of
south-central Alaska. The data sets also contain U-Pb isotopic
data and ages of detrital zircon from sedimentary and
metasedimentary rocks collected in the same region but also
from the...

Date published: July 21, 2020

Metabarcoding of Feces of Pacific Walruses and Autosomal DNA Sequence Data of Marine Invertebrates, 2012-2015, Alaska.

This data set describes nucleotide sequence data derived from 18S ribosomal DNA amplified in two fragments. A total of 87 feces from Pacific walrus and 57 marine invertebrates were examined for this study. Samples were collected from the Bering Sea and Chukchi Sea, Alaska. Samples used in the study originated from feces or muscle samples collected in the field from ice floes or benthic van...

Date published: July 17, 2020

Water Level, Temperature, and Discharge of Headwater Streams in the Yukon River Basin, Alaska, 2016 and 2017

This data set includes 15-minute interval data on stream temperature, stage, and discharge from low-order streams in the Yukon River Basin in interior Alaska, collected during the summer months. The depth of the water and temperature were determined using a combined pressure transducer and temperature sensor that was deployed through the summer months. Different sensors were used in each s...

Date published: July 17, 2020

Fortymile River Cosmogenic Isotope and Luminescence Data Collected 2016-2019

This dataset comprises four tables containing cosmogenic beryllium-10 and aluminum-26 concentrations and related data, as well as infrared stimulated luminescence data, from samples collected at 21 sites along the Fortymile River in eastern Alaska and Yukon, Canada between 2016 to 2018, and processed between 2016 and 2019. The file “geology_siteLocations_Fortymile_bender_2020.csv%

Date published: July 6, 2020

Lake Trout Otolith Growth Increment Measurements, Lake Clark National Park and Preserve, Alaska, 1979-2012

This data set documents the width of annual otolith growth increments from Lake Trout collected in lakes within Lake Clark National Park and Preserve, Alaska. The analysis of this data was published in von Biela et al. 2020 (DOI: 10.1111/eff.12566)

Date published: July 1, 2020

Temporal Viral Viability Data from Avian Influenza A Viruses Maintained in North American 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 for six North American wetlands, (3) water quality measurement from those wetlands, (4) laboratory-based study of viral viability using Minnesota wetland water, (5) naive mallards challenged experimentally with IAVs identified f

Filter Total Items: 135
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Year Published: 2018

Molecular testing of adult Pacific salmon and trout (Oncorhynchus spp.) for several RNA viruses demonstrates widespread distribution of piscine orthoreovirus in Alaska and Washington

This research was initiated in conjunction with a systematic, multiagency surveillance effort in the United States (U.S.) in response to reported findings of infectious salmon anaemia virus (ISAV) RNA in British Columbia, Canada. In the systematic surveillance study reported in a companion paper, tissues from various salmonids taken from...

Purcell, Maureen K.; Thompson, Rachel L.; Evered, Joy; Kerwin, John; Meyers, Ted R.; Stewart, Bruce; Winton, James
Purcell, M.K., R.L. Powers, J. Evered, J. Kerwin, T.R. Meyers, B. Stewart, and J.R. Winton. 2017. Molecular testing of adult Pacific salmon and trout (Oncorhynchus spp.) for several RNA viruses demonstrates widespread distribution of piscine orthoreovirus in Alaska and Washington. J. Fish Dis. 41(2): 347-355. DOI: 10.1111/jfd.12740.

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Year Published: 2018

Increasing rock-avalanche size and mobility in Glacier Bay National Park and Preserve, Alaska detected from 1984 to 2016 Landsat imagery

In the USA, climate change is expected to have an adverse impact on slope stability in Alaska. However, to date, there has been limited work done in Alaska to assess if changes in slope stability are occurring. To address this issue, we used 30-m Landsat imagery acquired from 1984 to 2016 to establish an inventory of 24 rock avalanches in a 5000-...

Coe, Jeffrey A.; Bessette-Kirton, Erin; Geertsema, Marten

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Year Published: 2017

Detrital zircon geochronology of quartzose metasedimentary rocks from parautochthonous North America, east-central Alaska

We report eight new U-Pb detrital zircon ages for quartzose metasedimentary rocks from four lithotectonic units of parautochthonous North America in east-central Alaska: the Healy schist, Keevy Peak Formation, and Sheep Creek Member of the Totatlanika Schist in the northern Alaska Range, and the Butte assemblage in the northwestern Yukon-Tanana...

Dusel-Bacon, Cynthia; Holm-Denoma, Christopher S.; Jones, James V.; Aleinikoff, John N.; Mortensen, James K.
Dusel-Bacon, C., Holm-Denoma, C.S., Jones, J.V. III, Aleinikoff, J.N., and Mortensen, J.K., 2017, Detrital zircon geochronology of quartzose metasedimentary rocks from parautochthonous North America, east-central Alaska: Lithosphere, v. 9, no. 6, p. 927–952; GSA Data Repository Item 2017332; https://doi.org/10.1130/L672.1

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Year Published: 2017

Geochemistry and mineralogy of the Dotson Zone HREE deposit in the Bokan Mountain peralkaline igneous complex, southeastern Alaska, USA

The Bokan Mountain igneous complex (BMIC) is a typical example of a peralkaline intrusive system that has evolved to the point of developing late stage HFSE- and REE-rich silicic pegmatites and dikes. The Dotson Zone comprises a series of felsic dikes that extend from the southeast margin of the composite pluton and may represent an important...

Taylor, Cliff D.; Lowers, Heather A.; Adams, David; Robinson, R. James
Taylor, C.D., Lowers, H.A., Adams, D.T., and Robinson, R.J., 2017, Geochemistry and mineralogy of the Dotson Zone HREE deposit in the Bokan Mountain peralkaline igneous complex, southeastern Alaska, USA. Proceedings of the 14th SGA Biennial Meeting, 20-23 August 2017, Quebec City, Canada, p. 1329-1332.

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Year Published: 2017

Recurrent Holocene movement on the Susitna Glacier Thrust Fault: The structure that initiated the Mw 7.9 Denali Fault earthquake, central Alaska

We conducted a trench investigation and analyzed pre‐ and postearthquake topography to determine the timing and size of prehistoric surface ruptures on the Susitna Glacier fault (SGF), the thrust fault that initiated the 2002 Mw 7.9 Denali fault earthquake sequence in central Alaska. In two of our three hand‐excavated trenches, we found...

Personius, Stephen; Crone, Anthony J.; Burns, Patricia A.; Reitman, Nadine G.
Personius, Stephen F., Crone, Anthony J., Burns, Patricia A., and Reitman, Nadine G., 2017, Recurrent Holocene Movement on the Susitna Glacier Thrust Fault: The Structure that Initiated the Mw 7.9 Denali Fault Earthquake, Central Alaska: Bulletin of the Seismological Society of America, Vol. 107, No. 4, pp. 1593–1609, August 2017, doi: 10.1785/0120160286

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Year Published: 2017

Gene transcription patterns in response to low level petroleum contaminants in Mytilus trossulus from field sites and harbors in southcentral Alaska

The 1989 Exxon Valdez oil spill damaged a wide range of natural resources, including intertidal communities, and post-spill studies demonstrated acute and chronic exposure and injury to an array of species. Standard toxicological methods to evaluate petroleum contaminants have assessed tissue burdens, with fewer assays providing...

Bowen, Lizabeth; Miles, A. Keith; Ballachey, Brenda E.; Waters, Shannon C.; Bodkin, James L.; Lindeberg, Mandy; Esler, Daniel N.
Bowen, L, AK Miles, B Ballachey, S Waters, J Bodkin, M Lindeberg, D Esler. 2017. Gene transcription patterns in response to low level petroleum contaminants in Mytilus trossulus from field sites and harbors in southcentral Alaska. Deep Sea Research Part II: Topical Studies in Oceanography. doi: 10.1016/j.dsr2.2017.08.007

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Year Published: 2017

Geographic and temporal patterns of variation in total mercury concentrations in blood of harlequin ducks and blue mussels from Alaska

We compared total mercury (Hg) concentrations in whole blood of harlequin ducks (Histrionicus histrionicus) sampled within and among two geographically distinct locations and across three years in southwest Alaska. Blue mussels were collected to assess correlation between Hg concentrations in locally available forage and birds. Mercury...

Savoy, Lucas; Flint, Paul L.; Zwiefelhofer, Denny; Brant, Heather; Perkins, Christopher R.; Taylor, Robert J.; Lane, Oksana P.; Hall, Jefferson S.; Evers, David C.; Schamber, Jason
Savoy, L., Flint, P., Zwiefelhofer, D., Brant, H., Perkins, C., Taylor, R., Lane, O., Hall, J., Evers, D., and Schamber, J., 2017, Geographic and temporal patterns of variation in total mercury concentrations in blood of harlequin ducks and blue mussels from Alaska, vol. 117, no. 1-2, p. 178-183. Doi: 10.1016/j.marpolbul.2017.01.084

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Year Published: 2017

Geospatial analysis identifies critical mineral-resource potential in Alaska

Alaska consists of more than 663,000 square miles (1,717,000 square kilometers) of land—more than a sixth of the total area of the United States—and large tracts of it have not been systematically studied or sampled for mineral-resource potential. Many regions of the State are known to have significant mineral-...

Jacques, Katherine; Landowski, Claire; Karl, Susan M.; Labay, Keith A.
Karl, S.M., and Labay, K.A., Geospatial analysis identifies critical mineral-resource potential in Alaska: U.S. Geological Survey Fact Sheet 2017–3012, 4 p., https://doi.org/10.3133/fs20173012.

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Year Published: 2017

Regional patterns of Mesozoic-Cenozoic magmatism in western Alaska revealed by new U-Pb and 40Ar/39Ar ages

In support of regional geologic framework studies, we obtained 50 new argon-40/argon-39 (40Ar/39Ar) ages and 33 new uranium-lead (U-Pb) ages from igneous rocks of southwestern Alaska. Most of the samples are from the Sleetmute and Taylor Mountains quadrangles; smaller collections or individual samples are from the Bethel, Candle, Dillingham,...

Dumoulin, Julie A.; Bradley, Dwight C.; Miller, Marti L.; Friedman, Richard M.; Layer, Paul W.; Bleick, Heather A.; Jones, James V.; Box, Steven E.; Karl, Susan M.; Shew, Nora B.; White, Timothy S.; Till, Alison B.; Dumoulin, Julie A.; Bundtzen, Thomas K.; O'Sullivan, Paul B.; Ullrich, Thomas D.
Bradley, D.C., Miller, M.L., Friedman, R.M., Layer, P.W., Bleick, H.A., Jones, J.V., III, Box, S.E., Karl, S.M., Shew, N.B., White, T.S., Till, A.B., Dumoulin, J.A., Bundtzen, T.K., O’Sullivan, P.B., and Ullrich, T.D., 2017, Regional patterns of Mesozoic-Cenozoic magmatism in western Alaska revealed by new U-Pb and 40Ar/39Ar ages, in Dumoulin, J.A., ed., Studies by the U.S. Geological Survey in Alaska, vol. 15: U.S. Geological Survey Professional Paper 1814–D, 48 p., https://doi.org/10.3133/pp1814D.

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Year Published: 2016

A possible source mechanism of the 1946 Unimak Alaska far-field tsunami, uplift of the mid-slope terrace above a splay fault zone

In 1946, megathrust seismicity along the Unimak segment of the Alaska subduction zone generated the largest ever recorded Alaska/Aleutian tsunami. The tsunami severely damaged Pacific islands and coastal areas from Alaska to Antarctica. It is the charter member of “tsunami” earthquakes that produce outsized far-field tsunamis for the recorded...

von Huene, Roland E.; Miller, John J.; Klaeschen, Dirk; Dartnell, Peter
von Huene, R., Miller, J.J., Klaeschen, D. et al. Pure Appl. Geophys. (2016) 173: 4189. https://doi.org/10.1007/s00024-016-1393-x

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Year Published: 2016

Observations and modeling of fjord sedimentation during the 30 year retreat of Columbia Glacier, AK

To explore links between glacier dynamics, sediment yields and the accumulation of glacial sediments in a temperate setting, we use extensive glaciological observations for Columbia Glacier, Alaska, and new oceanographic data from the fjord exposed during its retreat. High-resolution seismic data indicate that 3.2 × 108 m3 of sediment has...

Love, Katherine B; Hallet, Bernard; Pratt, Thomas L.; O'Neel, Shad

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Year Published: 2016

Hyperspectral surveying for mineral resources in Alaska

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 fully evaluate Alaska’s geology and mineral resource...

Kokaly, Raymond F.; Graham, Garth E.; Hoefen, Todd M.; Kelley, Karen D.; Johnson, Michaela R.; Hubbard, Bernard E.
Kokaly, R.F., Graham, G.E., Hoefen, T.M., Kelley, K.D., Johnson, M.R., and Hubbard, B.E., Hyperspectral surveying for mineral resources in Alaska: U.S. Geological Survey Fact Sheet 2016-3029, 2 p., http://dx.doi.org/10.3133/fs20163029.

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Bruce Wylie with graphic for USGS EROS podcast Eyes on Earth
December 19, 2019

Eyes on Earth Episode 20 - Mapping Alaska's Permafrost

The Arctic is changing at a more rapid rate than the rest of the planet. Some of the most significant changes are tied to the thawing of near-surface permafrost, the layers of frozen soil containing vast stocks of stored carbon. Scientists at EROS have used remote sensing tools to map the extent of near-surface permafrost in Alaska, offering a baseline for further research

Keychain in Inupiaq for USGS outreach activities about bird banding and reporting
December 3, 2019

Keychain in Inupiaq for USGS outreach activities about bird banding

Keychain developed for USGS outreach activities about bird banding and reporting in Inupiaq and English. Inupiaq translation provided by Qaiyaan and Jana Harcharek.

October 31, 2019

Animation depicting seasonal cycles on Alaska's Arctic bluffs

In the spring, winter sea ice thaws and moves offshore leaving the coast exposed to increased wave action and relatively warm water temperatures that, when in contact with the bluff, erodes the toe of the bluff. Additionally, warm air temperatures during the spring and summer months thaw the upper layers of permafrost causing erosion or sloughing of the bluff face above

Tundra swan on the Colville River Delta
October 31, 2019

Tundra swan on the Colville River Delta, Alaska

Tundra swan on the Colville River Delta, Alaska 2013.

October 24, 2019

Climate Adaptation Planning with Alaska-Based Adaptation Tools

The dynamic landscape and climate of Alaska presents many challenges to the over 200 communities that live in rural areas of the state and have a wide variety of resource needs. Coastal and riverine erosion, flooding, wildfire, permafrost dynamics and increasing temperatures act as drivers for many of these landscape changes. Both the Alaska Climate Adaptation Science

Beaver dam and lodge on the Wrench Creek, Noatak National Preserve
October 16, 2019

Beaver dam and lodge on the Wrench Creek, Noatak National Preserve

Beaver dam and lodge on the Wrench Creek, Noatak National Preserve

Beaver dam complex and lodge at the confluence of Wrench Creek and Kelly River, Noatak National Preserve
October 16, 2019

Beaver dam complex and lodge at the confluence

Beaver dam complex and lodge at the confluence of Wrench Creek and Kelly River, Noatak National Preserve

Adult Pacific salmon (Oncorhynchus nerka) caught in impounded water above beaver dam. >2 5rKM from coast
October 9, 2019

Adult Pacific salmon caught in impounded water above beaver dam

Adult Pacific salmon (Oncorhynchus nerka) caught in impounded water above beaver dam. >25 rKM (river KM) from coast.

A drainage gully through Arctic tundra with slumped chunks of turf and permafrost.
September 30, 2019

Drainage gully in coastal bluffs of Barter Island

Along the stretch of coastal bluffs of Barter Island, North Slope of Alaska, a new drainage gully developed between September 2018 and September 2019. USGS scientists have been measuring permafrost degradation, coastal erosion, and flooding hazards on and around Barter Island for the last decade.

View from above looking back at a coastal bluff where large sections have collapsed and crumbled onto the beach.
September 30, 2019

Oblique view of Barter Island bluffs

Example of a high-oblique photograph taken with an unmanned aerial system (UAS), or drone, of the coastal bluffs of Barter Island on North Slope of Alaska. The photographs from different time periods can be compared, using a technique called structure-from-motion photogrammetry, to measure changes in the coastal bluffs. This area of Alaska is experiencing very high rates

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Map of earthquake in Anchorage, Alaska, November 30, 2018
November 30, 2018

A magnitude 7.0 earthquake struck north of Anchorage, Alaska, on November 30, 2018, at 8:29 a.m. local time (17:29:28 UTC).  For the most up-to-date information, please visit the USGS event page, and for estimates of casualties and damage, visit the USGS Prompt Assessment of Global Earthquakes for Response (PAGER) website.

A man wearing cold-weather gear and standing on a high coastal bluff points to an instrument that is mounted on short a pole.
August 7, 2018

In July 2018, three USGS Pacific Coastal and Marine Science Center researchers installed instruments and hosted a community outreach event.

man standing on dock next to large white ship
August 6, 2018

Researchers from NOAA, U.S. Geological Survey and their partners have completed the first high-resolution, comprehensive mapping of one of the fastest moving underwater tectonic faults in the world, located in southeastern Alaska. This information will help communities in coastal Alaska and Canada better understand and prepare for the risks from earthquakes and tsunamis that can occur when faults suddenly move.

Map shows land and ocean with 3-D features of relief and depth and labeled locations such as cities and earthquake epicenter.
February 28, 2018

Why do some earthquakes trigger large tsunamis, and others don’t? Learn how earthquakes produce tsunamis, how scientists predict tsunami size and arrival times, and the differences in two recent small tsunamis.

Animated GIF of polar bears interacting on the ice
February 1, 2018

In June of 2014, the USGS released the first-ever polar bear point-of-view footage, offering a never-seen-before perspective from the top Arctic predator.

Photo of a large ship that is stationary and floating in smooth inlet water with its lights reflecting in the water.
January 31, 2018

USGS scientists hope to learn more about the earthquake hazards that this large, fast-moving fault poses to communities and tourists in Alaska and Canada.

Map showing part of southern Alaska and Gulf of Alaska, with orange star in Gulf & white dots strung out along Aleutian Islands
January 30, 2018

One week ago, on January 23rd at 12:31 a.m. local time, Alaskans were rocked by a magnitude 7.9 earthquake, with an epicenter in the Gulf of Alaska, about 350 miles southwest of Anchorage, and about 175 miles southeast of Kodiak Island.

Image shows a map of Florida with USGS groundwater monitoring stations
January 24, 2018

At 12:32 am Alaska time on January 23, 2018, a magnitude 7.9 earthquake shook Alaska residents out of their beds and set off fears of a tsunami all down the West Coast. Fortunately, the tsunami was only a few inches in height, but within an hour of the earthquake in Alaska, waves of a different sort were hitting far away in Florida. 

Regional map showing the Gulf of Alaska and epicenter of M7.9 earthquake
January 23, 2018

The USGS has up-to-date details on the January 23, 2018 event.

Image shows a river winding through a green landscape
December 22, 2017

Less than 80 miles from Prudhoe Bay, home to the giant oil fields that feed the Trans-Alaska Pipeline, lies the site of USGS’ latest oil and gas assessment: the National Petroleum Reserve-Alaska and adjacent areas. Managed by the Bureau of Land Management, the NPR-A covers 22.8 million acres, more than the entire state of South Carolina.

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