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Filter Total Items: 195
2018 Anchorage Earthquake -- Overflight Photo 1 - 12/03/18
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). 

Tundra swan on the Colville River Delta
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.

slope with grass and trees
Date Published: October 27, 2019
Status: Active

Sitka, AK

Recent Conditions

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

USGS
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,...

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument
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
A scenic of a Aleutian island with fireweed in full bloom
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...

Map of Alaska showing estimated mineral-resource potential
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.

Dead birds on the beach
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. 

Blue-winged Teal flying with a satellite transmitter
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...

Northern Pintail Duck swimming
Date Published: September 5, 2019
Status: Active

Tracking Data for Northern Pintails (Anas acuta)

Available here are tracking data of Northern Pintails, a duck species that, in Alaska, nests throughout the state and in adjacent regions of Russia and Canada. These data were collected to better understand the timing and patterns of migratory movements of Northern Pintails from wintering grounds in Japan as part of a project on the possible spread of Eurasian forms of avian influenza to North...

A Red-throated Loon swimming in a small lake
Date Published: September 5, 2019
Status: Active

Tracking Data for Red-throated Loons (Gavia stellata)

Available here are tracking data of Red-throated Loons, a species that breeds in coastal areas throughout Alaska and 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.

water with snow-covered mountains around
Date Published: August 21, 2019
Status: Completed

Potential Landslide Paths and Implications for Tsunami Hazards in Glacier Bay, Alaska – An Initial Investigation

Glacier Bay and its inlets are a popular destination for cruise ships and passenger boats; about 540,000 people visited Glacier Bay National Park and Preserve (GBNPP) in 2017. A typical tour of the Bay traverses the entire length up to the glacier calving viewpoints in the Johns Hopkins and Tarr Inlets.  A 2018 article “Landslides and Giant Waves” by the National Park Service (NPS) states, “...

Filter Total Items: 128
placeholder for data files
December 20, 2019

This data release includes tabular surveyed and interpolated elevation data, the processed computational mesh, and model output data used in scour evaluations. The methods of deriving these datasets and using them to calculate scour are described in the associated Scientific Investigations Report "Scour evaluations and conditions at selected bridge sites in Alaska, 2016-2017”. Thi

Yellow-billed loons are exposed to mercury on their wintering grounds in Asia before migrating to Alaska for breeding.
December 2, 2019

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 92 satellite transmitters attached to adult Yellow-billed Loons on their breeding range in Arctic Alaska and Canada, 2002-2017. The raw data were processed to accomplish two goals: flag implausible location estimates

Yellow-billed loons are exposed to mercury on their wintering grounds in Asia before migrating to Alaska for breeding.
December 2, 2019

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 92 satellite transmitters attached to adult Yellow-billed Loons on their breeding range in Arctic Alaska and Canada, 2002-2017. Five data files are included in the "rawData" folder of this data package. Two data files %2

Spectacled eider male and female flying near the Colville River in 2013.
November 12, 2019

This data set describes nuclear microsatellite genotypes derived from ten autosomal loci (Aph8, Aph16, Cmo7, Cmo9, Hhi5, Sfi10, Smo4, Smo6, Smo8, Smo12) and nucleotide sequence data derived from one mitochondrial DNA locus (control region). A total of 262 Spectacled Eiders were examined for this study. Samples were collected at Indigirka and Chaun River Deltas, Russia%

Taku Range, Juneau Icefield, Alaska
November 12, 2019

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

placeholder for data files
November 8, 2019

These data are in three tables relating to a series of ponds, visited weekly over the summer of 2013, in the Chipp River Basin on the Arctic Coastal Plain of northern Alaska. The tables provide: 1) location and description of each of the ponds, 2) physical information on pond characteristics (area, volume, and temperature), water chemistry (electrical conductivity, disso

Recovered river meanders along Kobuk River, Kobuk Valley National Park
October 30, 2019

This data set includes 15-minute interval data on stream temperature, stage, and discharge from low-order streams in the Noatak and Kobuk River valleys in Northwestern Alaska, collected during the summer months. Several sites in the Agashashok River basin were monitored in 2015 and 2016, and additional sites were added in 2017. The depth of the water and temperature were determined usin

Northern Pintail Duck swimming
September 18, 2019

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

Northern Pintail Duck swimming
September 18, 2019

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

Blue-winged Teal flying
September 18, 2019

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

Blue-winged Teal flying
September 18, 2019

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

USGS
September 10, 2019

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

Filter Total Items: 113
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Year Published: 2018

Using stereo satellite imagery to account for ablation, entrainment, and compaction in volume calculations for rock avalanches on Glaciers: Application to the 2016 Lamplugh Rock Avalanche in Glacier Bay National Park, Alaska

The use of preevent and postevent digital elevation models (DEMs) to estimate the volume of rock avalanches on glaciers is complicated by ablation of ice before and after the rock avalanche, scour of material during rock avalanche emplacement, and postevent ablation and compaction of the rock avalanche deposit. We present a model to account for...

Bessette-Kirton, Erin; Coe, Jeffrey A.; Zhou, Wendy
Bessette-Kirton, E. K., Coe, J. A., & Zhou, W. (2018). Using stereo satellite imagery to account for ablation, entrainment, and compaction in volume calculations for rock avalanches on glaciers: Application to the 2016 Lamplugh rock avalanche in Glacier Bay National Park, Alaska. Journal of Geophysical Research: Earth Surface,123, 622–641.

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Year Published: 2018

Ichthyophonus in sport-caught groundfishes from southcentral Alaska

This report of Ichthyophonus in common sport-caught fishes throughout the marine waters of southcentral Alaska represents the first documentation of natural Ichthyophonus infections in lingcod Ophiodon elongates and yelloweye rockfish Sebastes ruberrimus. In addition, the known geographic range of ...

Harris, Bradley P.; Webster, Sarah R.; Wolf, Nathan; Gregg, Jacob L.; Hershberger, Paul
Harris, B.P., S.R. Webster, N. Wolf, J.L. Gregg, and P.K. Hershberger. 2018. Ichthyophonus in sport-caught groundfishes from southcentral Alaska. Diseases of Aquatic Organisms 128(2):169-173.

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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

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: 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

Filter Total Items: 1,036
Argos Wildlife Tracking of Marbled Godwits
December 31, 2019

Argos Wildlife Tracking of Marbled Godwits

Argos Wildlife Tracking of Marbled Godwits

Argos Wildlife Tracking of Northern Pintails
December 31, 2019

Argos Wildlife Tracking of Northern Pintails

Argos Wildlife Tracking of Northern Pintails

Argos Wildlife Tracking of Yellow-billed Loons
December 31, 2019

Argos Wildlife Tracking of Yellow-billed Loons

Argos Wildlife Tracking of Yellow-billed Loons

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.

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 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

...
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 polar bear print in mud with a person's hand next to it.
September 30, 2019

Polar bear print

Cordell Johnson holds his hand next to a polar bear's footprint.

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pilots flying drones at Barter Island
March 29, 2019

The USGS has developed a low-cost technique for making detailed measurements of methane escaping from thawing permafrost in coastal Arctic bluffs.

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.

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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