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: 205
Date published: January 22, 2020
Status: Active

Tracking Data for Tundra Swans (Cygnus columbianus)

Available here are tracking data of Tundra Swans, a species that nests in coastal areas throughout Alaska and winters across a broad area of North America from the Pacific to Atlantic coasts. 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 North America.

Date published: January 21, 2020
Status: Active

Ecosystems Analytics

The Ecosystems Analytics group uses novel and cutting edge statistical, mapping, and graphical methods to conduct research on a variety of taxa.  Our overarching goal is to help inform wildlife and land management decisions through assisting partners with designing monitoring programs, analyzing existing data, and developing new research projects.  Our focus often involves modeling wildlife...

Date published: January 6, 2020
Status: Active

Pacific Brant Age Ratios

Pacific brant are an Arctic-breeding sea goose that stage and feed on seagrasses during the non-breeding season in coastal areas of Alaska.  Brant are an important subsistence and sport harvest species and the focus of several population surveys by state and federal agencies.  Each fall the entire population stages during migration in Izembek Lagoon, Alaska, presenting a unique opportunity to...

Date published: December 3, 2019
Status: Active

Tracking Data for Yellow-billed Loons (Gavia adamsii)

Available here are tracking data of Yellow-billed loons, a species that breeds in coastal areas of western and northern Alaska and adjacent regions of Russia and Canada.  This species winters along the Pacific coasts of North America and Eurasia. These data were collected to better understand the patterns of migratory movements and seasonal use of different regions of Alaska

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

On August 18, 2015, heavy rainfall triggered around 60 landslides in and around the city of Sitka, AK. The landslides moved downslope rapidly; several were damaging and one of these demolished a home on South Kramer Avenue killing three people.

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
Filter Total Items: 213
Date published: August 18, 2020

Argos Satellite Tracking Data for Thick-billed Murres (Uria lomvia) - 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 20 satellite transmitters attached to Thick-billed murres on their breeding range in arctic and western Alaska, 1995-1996. Five data files are included in the "rawData" folder of this data package. Two data files (with

Date published: August 18, 2020

Argos Satellite Tracking Data for Common Murres (Uria aalge) - 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 28 satellite transmitters attached to Common murres on their breeding range in arctic and western Alaska, 1994-1996. The raw data were processed to accomplish two goals: flag implausible location estimates and decode

Date published: August 18, 2020

Argos Satellite Tracking Data for Common Murres (Uria aalge) - 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 28 satellite transmitters attached to Common murres on their breeding range in arctic and western Alaska, 1994-1996. Five data files are included in the "rawData" folder of this data package. Two data files (with ident

Date published: August 14, 2020

Argos Satellite Tracking Data for Red-faced Cormorants (Phalacrocorax urile) - 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 2 satellite transmitters attached to Red-faced cormorants on Attu Island Alaska, 2006. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma

Date published: August 14, 2020

Argos Satellite Tracking Data for Red-faced Cormorants (Phalacrocorax urile) - 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 2 satellite transmitters attached to Red-faced cormorants on Attu Island Alaska, 2006. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the ra

Date published: August 14, 2020

Argos Satellite Tracking Data for Pelagic Cormorants (Phalacrocorax pelagicus) - 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 8 satellite transmitters attached to Pelagic cormorants on Middleton and Attu Islands, Alaska, 2000-2006. Five data files are included in the "rawData" folder of this data package. Two data files (with identical cont

Date published: August 14, 2020

Argos Satellite Tracking Data for Pelagic Cormorants (Phalacrocorax pelagicus) - 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 8 satellite transmitters attached to Pelagic cormorants on their breeding range at Middleton and Attu Islands, Alaska, 2000-2006. The raw data were processed to accomplish two goals: flag implausible location estim

Date published: August 14, 2020

Airborne electromagnetic and magnetic survey data, Iliamna Volcano, Alaska, June 2012

Airborne electromagnetic (AEM) and magnetic survey data were collected during June 2012 along 556 line-kilometers over Iliamna Volcano, Alaska. These data were collected in support of alteration and volcano flank instability mapping as part of the U.S. Geological Survey (USGS) Volcano Hazards Program. Data were acquired by SkyTEM Survey ApS SkyTEM304 system with the Soloy Helicopters Eu

Date published: August 11, 2020

Off-Main-Stem Channels in 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 off-main-stem channels. Off-main-stem channel boundaries were prepared from 2003 lidar elevation data and updated using 2017 and 2018 aerial orthophotographs at eroding riverbanks, s...

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

Filter Total Items: 138
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Year Published: 2018

Infectious canine hepatitis in a brown bear (Ursus arctos horribilis) from Alaska.

We diagnosed infectious canine hepatitis in a free-ranging brown bear (Ursus arctos horribilis) cub from Alaska, US, found dead in October 2015. Intranuclear inclusion bodies were present in hepatocytes, and immunohistochemistry showed reactivity to adenoviral antigens. Sequencing of the hexon protein of adenovirus showed 100% identity to canine...

Knowles, Susan; Bodenstein, Barbara; Hamon, Troy; Saxton, Michael W.; Hall, Jeffrey S.
J Wildl Dis. 2018 Mar 2. doi: 10.7589/2017-10-245. [Epub ahead of print] Infectious Canine Hepatitis in a Brown Bear ( Ursus arctos horribilis) from Alaska. Knowles S1, Bodenstein BL1, Hamon T2, Saxton MW2,3, Hall JS1.

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Year Published: 2018

Plateau subduction, intraslab seismicity, and the Denali (Alaska) volcanic gap

Tectonic tremors in Alaska (USA) are associated with subduction of the Yakutat plateau, but their origins are unclear due to lack of depth constraints. We have processed tremor recordings to extract low-frequency earthquakes (LFEs), and generated a set of six LFE waveform templates via iterative network matched filtering and stacking. The timing...

Chuang, Lindsay Yuling; Bostock, Michael; Wech, Aaron; Plourde, Alexandre
Chuang, L., Bostock, M., Wech, A., and Plourde, A., 2017, Plateau subduction, intraslab seismicity, and the Denali (Alaska) volcanic gap, Geology, doi:10.1130/G38867.1.

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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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March 1, 2020

Arctic Sea Ice Research at the USGS Florence Bascom Geoscience Center

This video introduces research that Florence Bascom Geoscience Center (FBGC) scientists are conducting on the 500,000 year history of Arctic sea ice to assess changes in weather, sea ice extent, temperature and ecosystems. The research informs decision makers on

Maps displaying the spatial-temporal variability in the NPPSD 3.0 dataset
February 10, 2020

Maps displaying the spatial-temporal variability in the NPPSD 3.0 data

Maps displaying the spatial-temporal variability in the NPPSD 3.0 dataset

click on image for full description
January 23, 2020

Alaska Central North Slope - January 2020

ALASKA CENTRAL NORTH SLOPE
January 2020

One of the most productive areas in the world for oil remains rich in the resource, according to the latest USGS assessment. This assessment is for undiscovered, technically recoverable oil and gas resources in conventional accumulations.

3.6 Billion Barrels of Oil
Estimate of the undiscovered

...
Attribution: Energy and Minerals
Aerial survey for Black Brant at Izembek Lagoon, Alaska
January 21, 2020

Aerial survey for Black Brant at Izembek Lagoon, Alaska

Example of a photo from the USFWS fall aerial survey for Black Brant at Izembek Lagoon. Inset shows a closer view of four Black Brant (bottom) with a Cackling Goose (top) foraging on eelgrass.  We can use artificial intelligence to automate counting birds in each photo to develop population estimates.

Semipalmated Sandpipers with leg bands or leg bands plus flag
January 21, 2020

Semipalmated Sandpipers with leg bands or leg bands plus flag

Semipalmated Sandpipers with A) Leg bands only (no flag), or B) leg bands plus flag From: Leg flags do not affect shorebird nests: https://doi.org/10.1111/jofo.12264

January 10, 2020

Image of the Week - An Aleutian Eruption, Day & Night

The Shishaldin Volcano on the eastern edge of Alaska's Aleutian Island chain erupted with activity in January of 2020. The eruption on the island of Unimak sent an ash cloud nearly 5 miles into the sky on January 7th, sparking ash alerts for aviators, mariners, and residents of nearby communities. Landsat 8 captured both day and night imagery of the event as it happened.

A satellite image that shows the eruption during the day and the night.
January 7, 2020

An Aleutian Eruption, Day and Night

The Shishaldin Volcano on the eastern edge of Alaska's Aleutian Island chain erupted with activity in January of 2020.

Geologist at Yukon Tanana Uplands Alaska
December 31, 2019

Geologist at Yukon Tanana Uplands Alaska

Geologist at Yukon Tanana Uplands Alaska.  This is part of the Earth MRI project.

A scientist on an all-terrain vehicle next to a tall permafrost bluff on a sandy coastline
December 31, 2019

Mapping Barter Island on an All Terrain Vehicle (ATV)

High ice content permafrost bluff erosion at Barter Island in 2019 after several coastal storms and a prolonged time of anomalously high air temperatures. 

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

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Graphic of lake dynamics study area in Yukon Flats, Alaska
March 27, 2019

Lakes don’t always behave as they’re expected to. Especially lakes in remote Arctic locales like Alaska’s Yukon Flats, where permafrost plays heavily into their behavior.

A man standing on a log in the grass near a bay
March 5, 2019

Recent geological studies of a key section of the Aleutian Island chain of Alaska suggest Aleutian tsunamis may occur more frequently than previously understood.

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.

Whimbrel on the tundra on the Seward Peninsula, Alaska
June 7, 2018

This story map describes the work of researchers from different organizations that document the migration of Whimbrels breeding in North America. Focusing on three individual birds from different parts of the species' breeding range, researchers used externally mounted solar-powered transmitters to monitor migratory movements and identify sites and habitats important to migratory shorebirds. 

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. 

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