Chagulak

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  • United States
  • Alaska
  • Stratovolcano
  • Unknown - Undated Evidence
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 52.577°N
  • 171.13°W

  • 1142 m
    3746 ft

  • 311200
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Chagulak.

The Global Volcanism Program has no Weekly Reports available for Chagulak.

The Global Volcanism Program has no Bulletin Reports available for Chagulak.

The 3-km-wide island of Chagulak in the Islands of the Four Mountains group is the summit of a small, unstudied stratovolcano NE of Amukta volcano. The two volcanoes coalesce at depth although they are separated by 7 km of ocean. Yunaska volcano lies about 20 km to the east. Sharp-topped Chagulak volcano rises steeply to 1142 m and is ruggedly dissected on the east side. No historical eruptions have been recorded from Chagulak volcano, and its age is not precisely known.

The Global Volcanism Program is not aware of any Holocene eruptions from Chagulak. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Chagulak page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.


Synonyms

Tchegulach
The 1142-m-high summit of erosionally modified Chagulak volcano rises above a sea of clouds. The unstudied, poorly known volcano forms a small 3-km-wide island NE of Amukta volcano. The two volcanoes coalesce at depth although they are separated by 7 km of ocean. No historical eruptions have been recorded from Chagulak volcano, and its age is not precisely known.

Photo by Dan Rogers, 1961 (courtesy of Alaska Volcano Observatory).
The ruggedly dissected eastern side of the Chagulak volcano rises to 1142 m above a sea of clouds. Chagulak is the summit of a small, unstudied stratovolcano NE of Amukta, the flat-topped volcano in the left distance. The two volcanoes coalesce at depth although they are separated by 7 km of ocean. No historical eruptions have been recorded from Chagulak volcano, and its age is not precisely known.

Photo by Fred Deines, 1992 (U.S. Fish and Wildlife Service).
The ruggedly dissected eastern side of Chagulak volcano rises to 1142 m above the sea surface as a thin cloud bank hovers around the base of the 3-km-wide island. Chagulak is the summit of a small, unstudied stratovolcano NE of Amukta volcano. No historical eruptions have been recorded from Chagulak volcano, and its age is not precisely known.

Photo by B. Anderson, 1992 (U.S. Fish and Wildlife Service).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Motyka R J, Liss S A, Nye C J, Moorman M A, 1993. Geothermal resources of the Aleutian arc. Alaska Div Geol Geophys Surv, Prof Rpt, no 114, 17 p and 4 map sheets.

Smith R L, Shaw H R, Luedke R G, Russell S L, 1978. Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States. U S Geol Surv Open-File Rpt, 78-925: 1-25.

Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.

Volcano Types

Stratovolcano

Tectonic Setting

Subduction zone
Intermediate crust (15-25 km)

Rock Types

Major
Andesite / Basaltic Andesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
0
0

Affiliated Databases

Large Eruptions of Chagulak Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.