Alagogshak
Spurr
Great Sitkin
Akutan
Aniakchak
Atka volcanic complex
Augustine
Cleveland
Dutton
Edgecumbe
Fisher
Gareloi
Great Sitkin
Griggs
Iliamna
Isanotski
Kanaga
Katmai
Little Sitkin
Mageik
Makushin
Martin
Novarupta
Pavlof
Redoubt
Semisopochnoi
Shishaldin
Snowy
Spurr
Takawangha
Tanaga
Trident
Ugashik-Peulik
Ukinrek Maars
Veniaminof
Westdahl
Wrangell
Adagdak
Addington volcanic field
Alagogshak
Amak
Amchixtam Chaxsxii
Amukta
Andrew Bay volcano
Basalt of Gertrude Creek
Behm Canal-Rudyerd Bay
Black Peak
Blue Mtn
Bobrof
Bogoslof
Buldir
Buzzard Creek
Camille Cone
Capital
Carlisle
Chagulak
Chiginagak
Churchill, Mt
Cone 3110
Cone 3601
Dana
Davidof
Denison
Devils Desk
Double Glacier
Douglas
Drum
Duncan Canal
Emmons Lake Volcanic Center
Espenberg
Folsoms Bluff
Fourpeaked
Frosty
Gas Rocks, the
Gilbert
Gordon
Gosling Cone
Hayes
Herbert
Imuruk Lake Volc Field
Ingakslugwat Hills
Ingenstrem Depression Volcanic Field
Ingrisarak Mtn
Iron Trig cone
Iskut-Unuk River cones
Jarvis
Jumbo Dome
Kagamil
Kaguyak
Kasatochi
Kejulik
Kialagvik
Kiska
Klawasi Group
Knob 1000
Kochilagok Hill
Koniuji
Kookooligit Mountains
Koyuk-Buckland volcanics
Kukak
Kupreanof
Lone basalt
Maclaren River volcanic field
Moffett
Monogenetic QT vents of WWVF
Morzhovoi
Nelson Island
Nunivak Island
Nushkolik Mountain volcanic field
Okmok
Pavlof Sister
Prindle Volcano
Rainbow River cone
Recheshnoi
Roundtop
Sanford
Seguam
Segula
Sergief
Skookum Creek
St. George volcanic field
St. Michael
St. Paul Island
Steller
Stepovak Bay 1
Stepovak Bay 2
Stepovak Bay 3
Stepovak Bay 4
Suemez Island
Table Top Mtn
Tanada Peak
Tanax̂ Angunax̂
Tlevak Strait
Togiak volcanics
Trader Mtn
Uliaga
Ungulungwak Hill-Ingrichuak Hill
Unimak 5270
Unnamed (near Ukinrek Maars)
Vsevidof
Western Cones
Wide Bay cone
Yantarni
Yunaska
Legend
✕
Red (Warning) | |
Orange (Watch) | |
Yellow (Advisory) | |
Green (Normal) | |
Uninstrumented | |
Community | |
Webcam | |
Instrument | |
Earthquake Magnitude | |
0
| |
Earthquake Age | |
Last 2 Hours | |
Last 2 Days | |
Last 1 Week |
Facts
- Seismically Monitored: No
- Color Code: UNASSIGNED
- Alert Level: UNASSIGNED
- Elevation: 1675m (5495ft)
- Latitude: 58.15737
- Longitude: -155.39839
- Smithsonian VNum:
- Pronunciation:
-
Nearby Towns:
- Kanatak 47 mi (76 km) SW
- Karluk 53 mi (86 km) SE
- King Salmon 59 mi (94 km) NW
- Larsen Bay 67 mi (109 km) SE
- South Naknek 70 mi (112 km) NW
Distance from Anchorage: 285 mi (459 km)
Description
From Hildreth and others (1999) [1] : "Alagogshak volcano, a newly recognized volcanic-front stratovolcano on the Alaska Peninsula rangecrest, 15 km southwest of Katmai Pass, produced 10-18 km3 of andesite-dacite eruptive products during several episodes of activity in the middle and late Pleistocene. From a central vent marked by hydrothermal alteration and remnants of a cratered fragmental cone on the present-day drainage divide, glacially incised stacks of lava flows (57-66 percent SiO,) dip radially and extend 6-10 km in most directions. Lava flows that make up four ridge-capping outliers well west of the volcano may also have erupted there. The medium-K calcalkaline Alagogshak eruptive suite is compositionally varied, probably reflecting independent evolution of different magma batches supplied in several episodes spread intermittently over at least 600,000 years."Name Origin
"Alagogshak volcano" is an informal name, applied to this feature by Wes Hildreth, Judy Fierstein, Martin Lanphere, and David Siems. The volcano's name is derived from nearby Alagogshak Creek. Alagogshak Creek is a Native name published by Griggs (1922), as "Alagogshuk Creek" (Orth, 1971).
References Cited
[1] Alagogshak volcano: A Pleistocene andesite-dacite stratovolcano in Katmai National Park, 1999
Hildreth, W., Fierstein, J., Lanphere, M. A., and Siems, D. F., 1999, Alagogshak volcano: A Pleistocene andesite-dacite stratovolcano in Katmai National Park: in Kelley, K.D. (ed.), Geologic studies in Alaska by the U.S. Geological Survey, 1997, U.S. Geological Survey Professional Paper PP 1614, p. 105-113.
Reported Activity
1 Event Date(s)
Past Activity Legend:
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Eruption |
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Questionable eruption |
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Non-eruptive activity |
Showing 1 - 8 of 8
Map Images
Map References
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
Understanding drivers of mercury in lake trout (Salvelinus namaycush), a top-predator fish in southwest Alaska's parklands, 2023
Bartz, K.K., Hannam, M.P., Wilson, T.L., Lepak, R.F., Ogorek, J.M., Young, D.B., Eagles-Smith, C.A., and Krabbenhoft, D.P., 2023, Understanding drivers of mercury in lake trout (Salvelinus namaycush), a top-predator fish in southwest Alaska's parklands: Environmental Pollution v. 330, 121678. https://doi.org/10.1016/j.envpol.2023.121678

An assessment of potential causal links between deglaciation and eruption rates at arc volcanoes, 2023


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.
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.
Three-dimensional seismic velocity structure and earthquake relocations at Katmai, Alaska, 2014
Murphy, Rachel, Thurber, Clifford, Prejean, Stephanie, and Bennington, Ninfa, 2014, Three-dimensional seismic velocity structure and earthquake relocations at Katmai, Alaska: Journal of Volcanology and Geothermal Research, v. 276, p. 121-131, doi:10.1016/j.jvolgeores.2014.02.22

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 .
Katmai scientific studies, 2012
Winfree, Robert, with contributions from Bacon, C.R., Bennett, A.J., Bennington, Ninfa, Berg, E.E., Brooks, Margi, Coletti, H.A., Coombs, M.L., Fierstein, Judy, Freeburg, Gary, Frost, G.V., Haney, Matthew, Jorgenson, M.T., Miller, A.E., Moran, Seth, Murphy, Rachel, Partnow, Patricia, Paskievitch, John, Stevens, D.P., Powell, Lee, Power, John, Prejean, S.G., Schaaf, Jeanne, Sherriff, R.L., Thurber, Clifford, and Welchman, R.A., 2012, Katmai science studies: Alaska Park Science Journal, v. 11, n. 1, 96 p., available online at http://www.nps.gov/akso/nature/science/ak_park_science/volume_11_issue_1.cfm .
Katmai National Park volcanoes, 2012
Fierstein, Judy, 2012, Katmai National Park volcanoes: in Winfree, Robert (project lead), Katmai Science Studies: Alaska Park Science Journal, v. 11, n. 1, p. 14-21, available online at http://www.nps.gov/akso/nature/science/ak_park_science/volume_11_issue_1.cfm .
Hard Copy held by AVO at FBKS - CEC shelf
Explosive eruptive record in the Katmai region, Alaska Peninsula: an overview, 2007
Fierstein, Judy, 2007, Explosive eruptive record in the Katmai region, Alaska Peninsula: an overview: Bulletin of Volcanology, v. 69, n. 5, p. 469-509, doi:10.1007/s00445-006-0097-y.

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
The great eruption of 1912, 2002
Adleman, Jennifer, 2002, The great eruption of 1912: National Park Service Alaska Park Science Winter 2002, Anchorage, AK, http://www.arlis.org/docs/vol1/52558645/52558645v1no1.pdf , p. 4-11.


Katmai geology guide, 2002
Riehle, Jim, 2002, Katmai geology guide: Publication Consultants, 112 p.
Alagogshak volcano: A Pleistocene andesite-dacite stratovolcano in Katmai National Park, 1999
Hildreth, W., Fierstein, J., Lanphere, M. A., and Siems, D. F., 1999, Alagogshak volcano: A Pleistocene andesite-dacite stratovolcano in Katmai National Park: in Kelley, K.D. (ed.), Geologic studies in Alaska by the U.S. Geological Survey, 1997, U.S. Geological Survey Professional Paper PP 1614, p. 105-113.


July-August 1997, 1997
Alaska Volcano Observatory, 1997, July-August 1997: Alaska Volcano Observatory Bimonthly Report, v. 9, n. 4, 31 p.




Mesozoic macrofossil locality map, checklists, and pre-Quaternary stratigraphic section of the Mt. Katmai and adjacent parts of the Afognak and Naknek quadrangles, Alaska Peninsula, Alaska, 1995
Miller, J.W., Elder, W.P., and Detterman, R.L., 1995, Mesozoic macrofossil locality map, checklists, and pre-Quaternary stratigraphic section of the Mt. Katmai and adjacent parts of the Afognak and Naknek quadrangles, Alaska Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 2021-G, 3 sheets. https://doi.org/10.3133/mf2021G
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.
Before an eruption
Ashfall & Preparedness Information
- Ashfall impacts & preparedness (US Geological Survey)
- Volcanic health hazards & impacts (International Volcanic Health Hazards Network)
- Ash Alert! Pamphlet (AK Division of Homeland Security & Emergency Management)
- Volcanic Ashfall (AK Department of Environmental Conservation, Division of Air Quality)