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  • United States
  • Alaska
  • Stratovolcano
  • Unknown - Evidence Credible
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 58.855°N
  • 153.542°W

  • 2140 m
    7019 ft

  • 312270
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Douglas.

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

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

Volcano Types


Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Andesite / Basaltic Andesite


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

Geological Summary

Glacier-covered, dissected Mount Douglas stratovolcano is located at the northern end of the Alaska Peninsula south of Kamishak Bay. The volcano, the NE-most in Katmai National Park, contains a small, ice-free summit crater lake and an active fumarole field. The volcano was constructed above Cretaceous and Jurassic sedimentary rocks. A lake temperature of 25 degrees Centigrade and a pH of 1 were measured in 1982. The fumaroles, which are actively depositing sulfur, were all at the pressure boiling point in 1982 and heated up to 114-118 degrees in 1991. The fumaroles are located on the NE wall of the 160 x 200 m wide crater lake; some fumaroles are subaqueous and produce turbulence on the surface of the blue-green lake. Unglaciated and relatively uneroded lava flows are found on the NW flank of the volcano. The age of the most recent eruptions from Douglas is not known, but Nye et al. (1998) considered activity to have occurred during the Holocene.

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

The Global Volcanism Program has no synonyms or subfeatures listed for Douglas.

Photo Gallery

The broad, glacier-covered Mount Douglas stratovolcano rises to 2140 m across Kamishak Bay as seen from Augustine Island to its NE. Douglas volcano anchors the northern tip of the Alaskan Peninsula. The rocks in the foreground are part of a young debris-avalanche deposit from Augustine volcano.

Photo by Lee Siebert, 1986 (Smithsonian Institution).
Mount Douglas, a dissected and largely ice-covered, 2140-m-high stratovolcano at the northern tip of the Alaska Peninsula, is viewed here from the north. The volcano contains a youthful-looking, fumarolically active summit crater filled by a warm, acidic lake, but the presence of Holocene lava flows or tephra deposits has not been confirmed.

Photo by Chris Nye (Alaska Division of Geological and Geophysical Surveys, Alaska Volcano Observatory).
The summit of 2140-m-high Douglas volcano on the northern tip of the Alaska Peninsula contains a warm and highly acidic crater lake approximately 160 m wide. An active fumarole field is also found on the shores of the crater lake of this glacier-covered stratovolcano.

Photo by Christina Neal (Alaska Volcano Observatory, U.S. Geological Survey).
Steam rises from an active fumarolic area on the north side (left center) of the summit lake at Douglas volcano on the northern tip of the Alaska Peninsula. The small, 160-m-wide crater is one of the few ice-free areas on Douglas volcano. In 1992, the lake had a pH of 1.1 and a temperature of 21 degrees Centigrade.

Photo by Chris Nye (Alaska Division of Geological and Geophysical Surveys).
Sulfur crystals line the edges of a fumarolic vent near the margin of a summit lake at Douglas volcano on the northern tip of the Alaska Peninsula.

Photo by Chris Nye (Alaska Division of Geological and Geophysical Surveys).


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.

Henning R A, Rosenthal C H, Olds B, Reading E (eds), 1976. Alaska's volcanoes, northern link in the ring of fire. Alaska Geog, 4: 1-88.

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.

Nye C J, Beget J E, Motyka R J, Layer P W, 1992. Geology and geochemistry of Mt. Douglas volcano, eastern Aleutian arc, Alaska (abs). Eos, Trans Amer Geophys Union, 73: 645.

Nye C J, McGimsey G, Power J, 1998. Volcanoes of Alaska. Alaska Div Geol Geophys Surv, Inf Circ, 38.

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.

Affiliated Databases

Large Eruptions of Douglas 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.