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Geologic map of the Makushin volcanic field, Unalaska Island, Alaska
Report of Investigation 97-20, Geologic map of the Makushin volcanic field, Unalaska Island, Alaska, covers most of the north end of Unalaska Island, which is the extent of the... -
Tephra occurrence in Alaska: a map-based compilation of stratigraphic tephra data
The principal hazard associated with future explosive eruptions of Alaska volcanoes is the generation of volcanic ash clouds which are explosively blasted high into the... -
Geologic map of Mount Chiginagak volcano, Alaska
Mount Chiginagak is a hydrothermally active volcano on the Alaska Peninsula, approximately 170 km south-southwest of King Salmon, Alaska. This small stratovolcano, approximately... -
Major-element glass compositions of tephra from the circa 3.6 ka eruption of...
This Raw Data File presents major-oxide glass geochemical results from the ca. 3.6 ka caldera-forming eruption of Aniakchak volcano, Alaska. These data are part of a larger... -
Geologic map of Mount Chiginagak volcano, Alaska
Report of Investigation 2017-10, Geologic map of Mount Chiginagak volcano, Alaska, provides 1:25,000 geologic mapping of the Chiginagak volcano. Mount Chiginagak is a... -
A Guide to the Late Quaternary History of Northern and Western Kenai...
Between 27 and 11 kyr ago, during the last major (Naptowne) glaciation, the northwestern and western Kenai Peninsula and the Cook Inlet trough were covered by ice except for... -
The 2008 phreatomagmatic eruption of Okmok Volcano, Aleutian Islands,...
Okmok volcano, Aleutian Islands, Alaska, explosively erupted over a five-week period between July 12 and August 23, 2008. The eruption was predominantly phreatomagmatic,... -
Geology of Kasatochi volcano, Aleutian Islands, Alaska
Kasatochi is a small, isolated island volcano in the center of the Aleutian Island chain. It consists of a roughly circular cone approximately 3 km in diameter with a lake-... -
Terrestrial Tephra Spectral Library for the Visible-Near-Infrared and...
Visible/near-infrared (VNIR) and mid-infrared (MIR) spectral library composed of twenty natural tephra samples from ten volcanic sources that span a range of compositions and... -
Geology of Kasatochi volcano, Aleutian Islands, Alaska
Kasatochi is a small, isolated island volcano in the center of the Aleutian Island chain. It consists of a roughly circular cone approximately 3 km in diameter with a lake-... -
Geologic map of the Big Delta A-4 Quadrangle, Alaska
This map illustrates extents and types of unconsolidated deposits and bedrock in the Big Delta A-4 Quadrangle, Alaska. This map is based on field observations begun by P�w� in... -
California volcano locations, threat rank and hazard zones
The California volcano locations, threat rank and hazard zones data release contains two shapefiles for download or use as a web map service. The California Volcanic Center... -
Surficial-geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska
Preliminary Interpretive Report 2001-3C, Surficial-Geologic Map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska, provides 1:63,360-scale geologic mapping of the... -
Measured stratigraphic section in the upper Schrader Bluff Formation (Late...
Preliminary Interpretive Report 2021-3, Measured stratigraphic section in the upper Schrader Bluff Formation (Late Campanian-Maastrichtian?), Ivishak River, Alaska, presents... -
Terrestrial Tephra Spectral Library for the Visible-Near-Infrared and...
Visible/near-infrared (VNIR) and mid-infrared (MIR) spectral library composed of twenty natural tephra samples from ten volcanic sources that span a range of compositions and... -
Kilauea 2018 lower East Rift Zone eruption - fissure 08 tephra polygons
The 2018 lower East Rift Zone eruption of Kilauea Volcano began in the late afternoon of 3 May, with fissure 1 opening and erupting lava onto Mohala Street in the Leilani... -
Major-element oxide, trace element, and glass compositional analyses from...
During the summers of 2017 and 2018, Alaska Volcano Observatory (AVO) geologists from the University of Alaska, Fairbanks (UAF), the U.S. Geological Survey (USGS), and the... -
Ash fall contour map of the 2009 eruption of Redoubt Volcano, Alaska:...
The 2009 eruption of Redoubt Volcano included 19 major tephra-producing explosions. Mass per unit area (MPUA) ash fall sampling of the resulting deposits allowed us to create... -
Preliminary volcano-hazard assessment for Fisher volcano, Unimak Island, Alaska
Fisher volcano, containing the largest Holocene caldera in the Aleutian volcanic arc, is an active volcano near the center of Unimak Island, about 120 kilometers southwest of... -
Terrestrial Tephra Spectral Library for the Visible-Near-Infrared and...
Visible/near-infrared (VNIR) and mid-infrared (MIR) spectral library composed of twenty natural tephra samples from ten volcanic sources that span a range of compositions and...