Douglas
Stratovolcano in United States
Key Facts
Elevation
2,140 m (7,021 ft)
Type
Stratovolcano
Location
58.855°, -153.542°
Region
Alaska Peninsula Volcanic Arc
Rock Type
Andesite / Basaltic Andesite
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
Glacier-covered, dissected Mount Douglas stratovolcano is located at the N end of the Alaska Peninsula south of Kamishak Bay, and is the NE-most in Katmai National Park. It was constructed above Cretaceous and Jurassic sedimentary rocks, and contains a small, ice-free summit crater lake and an active fumarole field. A lake temperature of 25°C and a pH of 1 were measured in 1982.
Fumaroles are located on the NE wall of the 160 x 200 m wide crater lake; some are subaqueous and produce turbulence on the surface of the blue-green lake. The fumaroles, which are actively depositing sulfur, were all at the pressure boiling point in 1982 and heated up to 114-118°C in 1991. Unglaciated and relatively uneroded lava flows are found on the NW flank.
The age of the most recent eruptions is not known, but Nye et al. (1998) considered activity to have occurred during the Holocene.
Volcanic Hazards & Risk Assessment
Primary Hazards
- Pyroclastic flows
- Lava flows
- Volcanic bombs and ballistics
- Lahars and mudflows
Risk Level
Geological Composition & Structure
Rock Types
Tectonic Setting
Age & Formation
Eruption Statistics & Analysis
| Metric | Value | Global Ranking | Significance |
|---|---|---|---|
| Total Recorded Eruptions | Unknown | Low | Moderately active volcano |
| Maximum VEI | VEI Unknown | Minor | Local impact potential |
| Recent Activity | Unknown | Historical | Historically active |
Monitoring & Alert Status
Monitoring Networks
Current Status
Nearby Volcanoes in North America Volcanic Regions
Quick Info
- •Smithsonian ID: 312270
- •Evidence: Evidence Credible
- •Epoch: Holocene
About the Photo
Mount Douglas is largely ice-covered and located at the northern tip of the Alaska Peninsula, is seen here from the north. The summit crater contains a warm, acidic lake.
Photo by Chris Nye (Alaska Division of Geological and Geophysical Surveys, Alaska Volcano Observatory).
Authority Sources
Related Volcanoes
Basic Information
This page shows basic data from the Smithsonian Global Volcanism Program. For more detailed information, visit the official Smithsonian page.