Redoubt
Facts
- Official Name: Redoubt Volcano
- Seismically Monitored: Yes
- Color Code: GREEN
- Alert Level: NORMAL
- Elevation: 3108m (10196ft)
- Latitude: 60.4852
- Longitude: -152.7438
- Smithsonian VNum: 313030
- Pronunciation:
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Nearby Towns:
- Ninilchik 47 mi (76 km) SE
- Salamatof 48 mi (78 km) NE
- Clam Gulch 49 mi (79 km) SE
- Nikiski 50 mi (81 km) NE
- Cohoe 50 mi (80 km) SE
Distance from Anchorage: 108 mi (174 km)
Description
From Miller and others (1998) [1] : "Redoubt Volcano is a steep-sided cone about 10 km in diameter at its base and with a volume of 30-35 cubic kilometers. The volcano is composed of intercalated pyroclastic deposits and lava flows and rests on Mesozoic granitic rocks of the Alaska-Aleutian Range batholith [2] [3] . It has been moderately dissected by the action of numerous alpine glaciers. A 1.8-km-wide, ice-filled summit crater is breached on the north side by a northward-flowing glacier, informally known as the Drift Glacier, which spreads into a piedmont lobe in the upper Drift River Valley. The most recently active vent is located on the north side of the crater at the head of the Drift glacier. Holocene lahar deposits in the Crescent River and Drift River valleys extend downstream as far as Cook Inlet."Name Origin
"Redoubt Volcano" is a translation of the Russian name "Sopka Redutskaya (Tebenkov, 1852). According to Constantin Grewingk (1850), the Native name "Ujakushatsch" also means "fortified place" but it is difficult to determine if one name is derived from the other (Orth, 1971).
References Cited
[1] Catalog of the historically active volcanoes of Alaska, 1998
Miller, T. P., McGimsey, R. G., Richter, D. H., Riehle, J. R., Nye, C. J., Yount, M. E., and Dumoulin, J. A., 1998, Catalog of the historically active volcanoes of Alaska: U.S. Geological Survey Open-File Report 98-0582, 104 p.
intro and TOC PDF 268 KB
references PDF 43 KB [2] Redoubt volcano, southern Alaska: a hazard assessment based on eruptive activity through 1968, 1993
Till, A. B., Yount, M. E., and Riehle, J. R., 1993, Redoubt volcano, southern Alaska: a hazard assessment based on eruptive activity through 1968: U.S. Geological Survey Bulletin 1996, 19 p., 1 sheet, scale 1:125,000.
full-text PDF 1.4 MB
plate 1 PDF 27 MB [3] The geologic history of Redoubt Volcano, Alaska, 1994
Till, A. B., Yount, M. E., and Bevier, M. L., 1994, The geologic history of Redoubt Volcano, Alaska: in Miller, T. P. and Chouet, B. A., (eds.), The 1989-1990 eruptions of Redoubt Volcano, Alaska, Journal of Volcanology and Geothermal Research, v. 62, n. 1, p. 11-30.Current Activity
No new updates for Redoubt volcano since April 23, 2010, 12:27 pm.
Recent Updates
Webcams
![Redoubt [Cook Inlet, 40 ft]](https://www.avo.alaska.edu/ashcam-api/images/redoubt-2/2025/79/redoubt-2-20250321T211100Z.jpg)
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Before an eruption
Ashfall & Preparedness Information
- ASH FALL ALERTS
- Ash Alert! Pamphlet
- USGS Ashfall Preparedness website
- Alaska Department of Environmental Conservation, Division of Air Quality - Volcanic Ashfall
- Alaska Department of Health - Volcanic Eruptions, Health Effects
- Citizen Science: Ashfall collection instructions
- Citizen Science: IS ASH FALLING? Report your observations (yes or no!)