Unified Interior Regions


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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February 28, 2017

Assessing Soil Moisture Availability Across the Gulf of Alaska Region

The distribution of water on the landscape influences many ecological functions such as the distribution of vegetation, soil development and the cycle of chemical nutrients. All of these functions are subject to change as a result of variations in the duration of soil water saturation and flow of water through the distributed channel networks of watersheds. The landscape

Aerial photo of snow-covered mountaIns with umbrella-shaped volcanic ash plume rising in the background
February 19, 2017

Bogoslof volcano eruption plume

February 19 Bogoslof eruption plume as seen from Unalaska Island, 53 miles ESE of Bogoslof volcano. Photo taken from helicopter during fieldwork by AVO geologists at 5:22PM, approximately 14 minutes after the start of the eruption.

Scintillometer sitting on top of a rock outcropping surrounded by trees
February 17, 2017

Torrs of the Ruby Batholith

Scintillometer and torrs of the Melozitna granite in the Ruby batholith.  This granite contains abundant monazite and high levels of thorium and rare earth elements. This area is part of the Bureau of Land Management's Central Yukon Planning Area, which USGS did a mineral assessment of in 2015.

Satellite image of small crescent-shaped ocean island.
January 24, 2017

Shoreline changes at Bogoslof volcano

Analysis of shoreline changes at Bogoslof volcano due to eruptive activity between January 11 and 24, 2017. The base image is a Worldview-2 satellite image collected on January 24, 2017. The approximate location of the shoreline on January 11, 2017 is shown by the dashed orange line.

Annotated aerial photo of crescent shaped island surrounded by open ocean.
January 10, 2017

Annotated photo of Bogoslof Island showing effects of eruption

Annotated photograph of Bogoslof Island showing the cumulative effects of 2016-17 eruptive activity. A layer of fine muddy appearing ash drapes most of the landscape and covers pre-existing vegetation. The dashed line indicates the area excavated by explosive eruptive activity so far. A prominent zone of upwelling is probably the surface expression of a shallow submarine

A long-beaked brown bird standing in the grass
December 31, 2016

Bristle-thighed Curlew in Alaska

A Bristle-thighed Curlew on the tundra.  This photo was taken during the Changing Arctic Ecosystems Boreal-Arctic Transition program.

Image shows a sample of epidote and quartz against a black background
December 31, 2016

Epidote and Quartz

Epidote is a silicate mineral used mostly as a semiprecious gemstone.

Sample provided by Carlin Green, USGS. Sample originated from Prince of Wales Island, Alaska, and is 6.0cm in size.

Alaska Interior mountain range shot with snow capped mountains.
December 31, 2016

Alaska Interior Mountain Range

Alaska Interior mountain range shot with snow capped mountains. 

photo of dead trees along a coastline with water and background mountains
December 31, 2016

Drowned Forest in Girdwood, AK from 1964 Alaska Earthquake and Tsunami

Shaking during the 1964 Alaska earthquake was felt as far away as Seattle, Washington, and its tsunamis caused 129 fatalities and about $2.3 billion in property losses (2013 dollars). This massive shift of the Pacific Plate also caused widespread, permanent land-level changes, which are still visible at Girdwood, Alaska, where the land dropped almost 2 meters (6.6 feet);

View looks out from a boat with instruments mounted on the side, over the water and in the far distance are snow-capped peaks.
December 31, 2016

Seafloor mapping in southeastern Alaska

Mount Crillon in the backdrop during a multibeam bathymetry survey of the Queen Charlotte-Fairweather Fault, offshore southeastern Alaska.

Large euhedral shape (brown) in a fine-grained matrix of rectangles
December 31, 2016

Rock thin section: andesite

Photomicrograph of sample 09RDWES301 - an andesite collected during the Redoubt 2009 eruption. A rock thin section is created by gluing a small piece of rock onto a glass slide, then grinding it down to a thickness of 30 microns (the average human hair is about 100 microns in diameter) so that light shines through it when examined under the microscope. In this image, the

A layout diagram of the R/V Alaskan Gyre
November 30, 2016

A layout diagram of the R/V Alaskan Gyre

A layout illustration of the R/V Alaskan Gyre deck.

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December 13, 1996

Just in time for Christmas, Pavlof volcano in Alaska and Montserrat volcano in the Caribbean are more active but are not expected to alter or delay Santa’s trip around the world, according to the U.S. Geological Survey.

August 9, 1996

From glaciers and lava flats to white spruce woodlands and bog communities, a new U.S. Geological Survey report will aid scientists, managers and planners in organizing environmental data.

October 5, 1995

A magnitude 6.4 earthquake occurred Thurs., Oct. 5, 1995, in Alaska, about 40 miles northwest of Fairbanks, at 9:23 p.m. Alaska Daylight Time (1:23 a.m. EDT, Oct. 6), according to the U.S. Geological Survey.

October 2, 1995

"After seven months of near-stagnation, Alaska’s Bering Glacier resumed surging. Between May 19th and June 1, part of the glacier advanced almost half a mile (about 2,500 ft). As of mid-September, the surge was continuing," said Bruce F. Molnia, leader of the U.S. Geological Survey’s Bering Glacier Research Project.