Alaska Volcano Observatory

Description Past Activity Images Maps Bibliography Prepare

Facts

Official Name: Chagulak Island
Seismically Monitored: No
Color Code: UNASSIGNED
Alert Level: UNASSIGNED
Elevation: 1142m (3746ft)
Latitude: 52.5714
Longitude: -171.1395
Smithsonian VNum: 311200
Pronunciation:
Nearby Towns:
- Nikolski 98 mi (158 km) NE
- Atka 132 mi (212 km) SW
- Unalaska 211 mi (339 km) NE
- Adak 237 mi (382 km) SW
- Akutan 246 mi (396 km) NE
Distance from Anchorage: 992 mi (1597 km)

Description

From Wood and Kienle (1990)^[1]: "Chagulak is a small stratovolcano separated from Amukta by ~7 km of ocean, but the two coalesce at depth. Chagulak is unstudied; the only geologic information available is a single chemical analysis. A low-potassium, high-alumina basaltic andesite (51% SiO2, 0.59% K2O) was recovered from the north-northwest shore of the island, but the sample's geologic setting is unknown."

Name Origin

The U.S. Coast and Geodetic Survey gave the Unangam Tunuu name "Chagulak" to Chagulak Island in 1931, to avoid repeating the name "Chugul." This island was called "O[strov] Chugula" by Lt. Sarychev (1826) (Orth, 1971).

References Cited

[1] Volcanoes of North America: United States and Canada, 1990

Wood, C. A., and Kienle, Juergen, (eds.), 1990, Volcanoes of North America: United States and Canada: New York, Cambridge University Press, 354 p.

Reported Activity

Modern Eruptions

0 Event Date(s)

Past Activity Legend:

	Eruption
	Questionable eruption
	Non-eruptive activity

Backscatter electron polished mount image of an Edgecumbe rhyolite pumice (sample 82ARJ136). Image acquired on an JEOL 6510LV SEM at 20 kV, 12 mm working distance, spot size of 65, and in BEC imaging mode.

Carlisle, Cleveland and Herbert Volcanoes (right to left) seen from the summit ridge of Tana Volcano. Summits of Yunaska and Chagulak Volcanoes visible in the background. Photo taken during the 2015 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.

Showing 1 - 10 of 10

Map Images

By: U.S. Geological Survey
Topographic shaded relief image of Amukta, Chagulak, and Yunaska.

Map References

Volcanoes of Alaska, 1998

Nye, C. J., Queen, Katherine, and McCarthy, A. M., 1998, Volcanoes of Alaska: Alaska Division of Geological & Geophysical Surveys Information Circular IC 0038, unpaged, 1 sheet, scale 1:4,000,000, available at http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=7043 .

website with links to sheets in PDF format

Hard Copy held by AVO at FBKS - CEC shelf

Volcanoes of Alaska, 1995

Alaska Division of Geological & Geophysical Surveys, 1995, Volcanoes of Alaska: Alaska Division of Geological & Geophysical Surveys Information Circular IC 0038, unpaged, 1 sheet, scale 1:4,000,000.

Geothermal resources of the Aleutian Arc, 1993

Motyka, R. J., Liss, S. A., Nye, C. J., and Moorman, M. A., 1993, Geothermal resources of the Aleutian Arc: Alaska Division of Geological & Geophysical Surveys Professional Report PR 0114, 17 p., 4 sheets, scale 1:1,000,000.

Hard Copy held by AVO at FBKS - CEC shelf

Holocene volcanoes of the Aleutian Arc, Alaska, 1993

March, G. D., 1993, Holocene volcanoes of the Aleutian Arc, Alaska: Alaska Division of Geological & Geophysical Surveys Public-Data File PDF 93-85, unpaged, 1 sheet, scale 1:2,000,000.

Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Alaska, 1986

Luedke, R. G., and Smith, R. L., 1986, Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I 1091-F, unpaged, 3 sheets, scale 1:1,000,000.

References

Geologic database of information on volcanoes in Alaska (GeoDIVA), 2022

Cameron, C.E., Crass, S.W., and AVO Staff, eds, 2022, Geologic database of information on volcanoes in Alaska (GeoDIVA): Alaska Division of Geologic and Geophysical Surveys Digital Data Series 20, https://doi.org/10.14509/geodiva, https://doi.org/10.14509/30901.

2018 update to the U.S. Geological Survey national volcanic threat assessment, 2018

Ewert, J.W., Diefenbach, A.K., and Ramsey, D.W., 2018, 2018 update to the U.S. Geological Survey national volcanic threat assessment: U.S. Geological Survey Scientific Investigations Report 2018-5140, 40 p., https://pubs.usgs.gov/sir/2018/5140/sir20185140.pdf.

download from USGS

Alaska Volcano Observatory image database, 2016

Cameron, C.E., and Snedigar, S.F., 2016, Alaska Volcano Observatory image database: Alaska Division of Geological & Geophysical Surveys Digital Data Series 13, https://www.avo.alaska.edu/images/. https://doi.org/10.14509/29689.

publication page at DGGS

AVO image database

Preliminary database of Quaternary vents in Alaska, 2014

Cameron, C.E., and Nye, C.J., 2014, Preliminary database of Quaternary vents in Alaska: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 153, 11 p., doi:10.14509/27357 .

Preliminary spreadsheet of eruption source parameters for volcanoes of the world, 2009

Mastin, L.G., Guffanti, Marianne, Ewert, J.E., and Spiegel, Jessica, 2009, Preliminary spreadsheet of eruption source parameters for volcanoes of the world: U.S. Geological Survey Open-File Report 2009-1133, v. 1.2, 25 p., available at http://pubs.usgs.gov/of/2009/1133/ .

System for ranking relative threats of U.S. volcanoes, 2007

Ewert, John, 2007, System for ranking relative threats of U.S. volcanoes: Natural Hazards Review, v. 8, n. 4, p. 112-124.

Volcanoes of the world: an illustrated catalog of Holocene volcanoes and their eruptions, 2003

Siebert, L., and Simkin, T., 2002-, Volcanoes of the world: an illustrated catalog of Holocene volcanoes and their eruptions: Smithsonian Institution, Global Volcanism Program Digital Information Series GVP-3, http://volcano.si.edu/search_volcano.cfm, unpaged internet resource.

website

Bibliography of information on Alaska volcanoes, 2003

Cameron, C. E., Triplehorn, J. H., and Robar, C. L., 2003, Bibliography of information on Alaska volcanoes: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication MP 131, 1 CD-ROM.

Hard Copy held by AVO at FBKS - CEC file cabinet

Volcanoes of Alaska, 1998

website with links to sheets in PDF format

Hard Copy held by AVO at FBKS - CEC shelf

Volcanoes of Alaska, 1995

Alaska Division of Geological & Geophysical Surveys, 1995, Volcanoes of Alaska: Alaska Division of Geological & Geophysical Surveys Information Circular IC 0038, unpaged, 1 sheet, scale 1:4,000,000.

Volcanoes of the world [2nd edition], 1994

Simkin, Tom, and Siebert, Lee, 1994, Volcanoes of the world [2nd edition]: Tucson, Arizona, Geoscience Press, 349 p.

Hard Copy held by AVO at FBKS - CEC shelf

The geology, geochemistry and petrology of the recent magmatic phase of the central and western Aleutian Arc, 1994

Myers, J. D., 1994, The geology, geochemistry and petrology of the recent magmatic phase of the central and western Aleutian Arc: unpublished manuscript unpaged.

Hard Copy held by AVO at FBKS - CEC shelf

Age, character, and significance of Aleutian arc volcanism, 1994

Fournelle, J. H., Marsh, B. D., and Myers, J. D., 1994, Age, character, and significance of Aleutian arc volcanism: in Plafker, George and Berg, H. C., (eds.), The Geology of Alaska, Geological Society of America The Geology of North America Series v. G-1, p. 723-758.

Aleut dictionary, Unangam Tunudgusii, an unabridged lexicon of the Aleutian, Pribilof, and Commander Islands Aleut language, 1994

Bergsland, Knut, comp., 1994, Aleut dictionary, Unangam Tunudgusii, an unabridged lexicon of the Aleutian, Pribilof, and Commander Islands Aleut language: University of Alaska Fairbanks, Alaska Native Language Center, 739 p.

Geothermal resources of the Aleutian Arc, 1993

Hard Copy held by AVO at FBKS - CEC shelf

Holocene volcanoes of the Aleutian Arc, Alaska, 1993

March, G. D., 1993, Holocene volcanoes of the Aleutian Arc, Alaska: Alaska Division of Geological & Geophysical Surveys Public-Data File PDF 93-85, unpaged, 1 sheet, scale 1:2,000,000.

Volcanoes of North America: United States and Canada, 1990

Wood, C. A., and Kienle, Juergen, (eds.), 1990, Volcanoes of North America: United States and Canada: New York, Cambridge University Press, 354 p.

Hard Copy held by AVO at FBKS - CEC shelf

Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Alaska, 1986

The Aleutians, 1982

Marsh, B. D., 1982, The Aleutians: in Thorpe, R. S., (ed.), Andesites: orogenic andesites and related rocks, Chichester, United Kingdom, John Wiley & Sons, p. 99-114.

Hard Copy held by AVO at FBKS - CEC file cabinet

Volcanoes of the world, 1981

Simkin, Tom, Siebert, Lee, McClelland, Lindsay, Bridge, David, Newhall, Christopher, and Latter, J. H., 1981, Volcanoes of the world: Stroudsburg, PA, Hutchinson Publishing Company, 233 p.

Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States, 1978

Smith, R. L., Shaw, H. R., Luedke, R. G., and Russell, S. L., 1978, Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States: U.S. Geological Survey Open-File Report 78-0925, p. 1-25.

Hard Copy held by AVO at FBKS - CEC shelf

Notes on the islands of the Unalashka district; and, Notes on the Atkhan Aleuts and the Kolosh [translated from Russian by Richard Henry Geogheghan], 1968

Veniaminov, Ivan, 1968, Notes on the islands of the Unalashka district; and, Notes on the Atkhan Aleuts and the Kolosh [translated from Russian by Richard Henry Geogheghan]: Martin, Fredericka, (ed.), Unpublished manuscript, Fairbanks, AK, 944 p.

Alaska Peninsula-Aleutian Islands, 1958

Powers, H. A., 1958, Alaska Peninsula-Aleutian Islands: in Williams, H., (ed.), Landscapes of Alaska, Los Angeles, CA, University of California Press, p. 61-75.

United States coast pilot, Alaska Part 2, Yakutat Bay to Arctic Ocean, 1947

U.S. Department of Commerce, and Coast and Geodetic Survey, 1947, United States coast pilot, Alaska Part 2, Yakutat Bay to Arctic Ocean: Washington DC, United States Government Printing Office, 659 p.

Volcanic phenomena and earthquakes during 1878, 1879

Unknown, 1879, Volcanic phenomena and earthquakes during 1878: Nature, v. 20, p. 378-379.

Hard Copy held by AVO at FBKS - CEC file cabinet

Notes on the islands of the Unalaska district [translated from Russian by Lydia T. Black and R.H. Geoghegan in 1984], 1840

Veniaminov, Ivan, 1840, Notes on the islands of the Unalaska district [translated from Russian by Lydia T. Black and R.H. Geoghegan in 1984]: Pierce, R. A., (ed.), Kingston, Ontario, Limestone Press, 511 p.

Hard Copy held by AVO at FBKS - CEC file cabinet

Notes on the islands of the Unalashka district [Zapiski ob ostravakh Unalashkinskogo otdela], 1840

Veniaminov, I., 1840, Notes on the islands of the Unalashka district [Zapiski ob ostravakh Unalashkinskogo otdela]: v. 1-3, St. Petersburg, Russiisko-Amerikanskoi Kompanii, unknown.

Past volcanic activity in the Aleutian arc,

Coats, R. R., Past volcanic activity in the Aleutian arc: U.S. Geological Survey Volcano Investigations Report 1, 18 p.

full-text PDF 22.3 MB

	Red (Warning)
	Orange (Watch)
	Yellow (Advisory)
	Green (Normal)
	Uninstrumented
	Community
	Webcam
	Instrument
	Earthquake

Alaska Volcano Observatory

Chagulak

Facts

Description

Name Origin

References Cited

[1] Volcanoes of North America: United States and Canada, 1990

Reported Activity

Modern Eruptions

0 Event Date(s)

Map Images

Map References

Volcanoes of Alaska, 1998

Volcanoes of Alaska, 1995

Geothermal resources of the Aleutian Arc, 1993

Holocene volcanoes of the Aleutian Arc, Alaska, 1993

Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Alaska, 1986

References

Geologic database of information on volcanoes in Alaska (GeoDIVA), 2022

2018 update to the U.S. Geological Survey national volcanic threat assessment, 2018

Alaska Volcano Observatory image database, 2016

Preliminary database of Quaternary vents in Alaska, 2014

Preliminary spreadsheet of eruption source parameters for volcanoes of the world, 2009

System for ranking relative threats of U.S. volcanoes, 2007

Volcanoes of the world: an illustrated catalog of Holocene volcanoes and their eruptions, 2003

Bibliography of information on Alaska volcanoes, 2003

Volcanoes of Alaska, 1998

Volcanoes of Alaska, 1995

Volcanoes of the world [2nd edition], 1994

The geology, geochemistry and petrology of the recent magmatic phase of the central and western Aleutian Arc, 1994

Age, character, and significance of Aleutian arc volcanism, 1994

Aleut dictionary, Unangam Tunudgusii, an unabridged lexicon of the Aleutian, Pribilof, and Commander Islands Aleut language, 1994

Geothermal resources of the Aleutian Arc, 1993

Holocene volcanoes of the Aleutian Arc, Alaska, 1993

Volcanoes of North America: United States and Canada, 1990

Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Alaska, 1986

The Aleutians, 1982

Volcanoes of the world, 1981

Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States, 1978

Notes on the islands of the Unalashka district; and, Notes on the Atkhan Aleuts and the Kolosh [translated from Russian by Richard Henry Geogheghan], 1968

Alaska Peninsula-Aleutian Islands, 1958

United States coast pilot, Alaska Part 2, Yakutat Bay to Arctic Ocean, 1947

Volcanic phenomena and earthquakes during 1878, 1879

Notes on the islands of the Unalaska district [translated from Russian by Lydia T. Black and R.H. Geoghegan in 1984], 1840

Notes on the islands of the Unalashka district [Zapiski ob ostravakh Unalashkinskogo otdela], 1840

Past volcanic activity in the Aleutian arc,

Before an eruption

Ashfall & Preparedness Information

Useful Links