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Alaska Region

USGS in Alaska conducts science for decision-making in five major areas: natural hazards; energy & minerals; water quality, streamflow & ice; wildlife, fish & habitat; and geospatial mapping. The Alaska Regional Office provides management and strategic coordination among the Alaska Science Center, the Volcano Science Center, & other partners operating in AK.

News

AquaDePTH: Merging Aquatic Disease Surveillance Data into One Useful Tool

AquaDePTH: Merging Aquatic Disease Surveillance Data into One Useful Tool

USGS Measures Glacial Flooding in Juneau, Alaska

USGS Measures Glacial Flooding in Juneau, Alaska

Science Spotlight: USGS Monitoring of Glacial Outburst Flood in Juneau Alaska

Science Spotlight: USGS Monitoring of Glacial Outburst Flood in Juneau Alaska

Publications

Tectonic implications of transitional melting regimes from petrological, geochronological, and compositional characterization of the ophiolitic Seventymile terrane, Alaska, USA Tectonic implications of transitional melting regimes from petrological, geochronological, and compositional characterization of the ophiolitic Seventymile terrane, Alaska, USA

New geochemical, U-Pb geochronology, and Sr-Nd-Hf isotope data provide evidence for the tectonic evolution of the Seventymile terrane in interior Alaska, USA. Ultramafic and mafic rocks of the Seventymile terrane are thought to represent components of a dismembered ophiolite and provide unique constraints on regional terrane evolution and accretion. The Seventymile ophiolite represents...
Authors
Erin Todd, Jonathan Saul Caine, Michael Bizimis, Andrew R.C. Kylander-Clark, Robert Reece Hammond, Alicja Wypych

U.S. Geological Survey—Department of the Interior, Region 11, Alaska—2023–24 biennial science report U.S. Geological Survey—Department of the Interior, Region 11, Alaska—2023–24 biennial science report

Introduction U.S. Geological Survey (USGS) Mission—The USGS national mission is to monitor, analyze, and predict the current and evolving dynamics of complex human and natural Earth-system interactions and to deliver actionable information at scales and timeframes relevant to decision makers. Consistent with the national mission, the USGS in Alaska provides timely and objective...

A time-space model of graphite mineral systems A time-space model of graphite mineral systems

Increasing demand for graphite in energy storage systems warrants review of graphite ore genesis in a mineral systems framework. Orogenic graphite encompasses the metamorphic and orogenic mineral systems that produce flake graphite and hydrothermal vein (lump and chip) graphite deposits, respectively. A common feature of orogenic graphite deposits is an association with upper amphibolite...
Authors
George N.D. Case

Science

Alaska Science Center Weekly Findings

Alaska Science Center Weekly Findings

Recent findings by USGS Alaska Science Center staff and their collaborators.
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Heat stress in Alaska's Pacific salmon

Alaska's freshwater spans a wide range of summer water temperatures, from ice-cold glacier water to warm rivers that routinely reach stressful levels for salmon, exceeding 18°C/64°F and even surpassing 21°C/70°F. Pacific salmon population trends are also varied and include declines in many Chinook salmon populations. Salmon declines are kitchen table issues because salmon fishing is key to the...
Heat stress in Alaska's Pacific salmon

Heat stress in Alaska's Pacific salmon

Alaska's freshwater spans a wide range of summer water temperatures, from ice-cold glacier water to warm rivers that routinely reach stressful levels for salmon, exceeding 18°C/64°F and even surpassing 21°C/70°F. Pacific salmon population trends are also varied and include declines in many Chinook salmon populations. Salmon declines are kitchen table issues because salmon fishing is key to the...
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Polar Bear Research

Polar bears ( Ursus maritimus) are one of 4 marine mammal species managed by the U.S. Department of Interior. The USGS Alaska Science Center leads long–term research on polar bears to inform local, state, national and international policy makers regarding conservation of the species and its habitat. Our studies, ongoing since 1985, are focused on population dynamics, health and energetics...
Polar Bear Research

Polar Bear Research

Polar bears ( Ursus maritimus) are one of 4 marine mammal species managed by the U.S. Department of Interior. The USGS Alaska Science Center leads long–term research on polar bears to inform local, state, national and international policy makers regarding conservation of the species and its habitat. Our studies, ongoing since 1985, are focused on population dynamics, health and energetics...
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