Korovin
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Facts
- Official Name: Korovin Volcano
- Seismically Monitored: No
- Color Code: GREEN
- Alert Level: NORMAL
- Elevation: 1533m (5029ft)
- Latitude: 52.37934
- Longitude: -174.1548
- Smithsonian VNum: 311161
- Pronunciation:
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Nearby Towns:
- Atka 13 mi (21 km) SW
- Adak 111 mi (178 km) SW
- Nikolski 225 mi (362 km) NE
- Unalaska 332 mi (534 km) NE
- Saint George 345 mi (556 km) NE
Distance from Anchorage: 1092 mi (1758 km)
Description
From Miller and others (1998) [1] : "The active volcano front runs through northern Atka Island which has been geologically mapped on a reconnaissance scale by Marsh (1990, in Wood and Kienle, 1990 [2] ) who described the overall structure of the volcanic center as that of a broad central shield upon which a large stratocone (Atka volcano) had been built. This cone was destroyed during caldera formation about 300,000 to 500,000 years ago. Korovin, neighboring Kliuchef, and probably Konia are products of the latest stage of volcanic activity on the island, which began perhaps 100,000 years ago based on the degree of dissection (B. Marsh, written commun., 1982)."Korovin volcano is a stratovolcano, 1533 m high and almost 7 km in basal diameter, having two summit vents 0.6 km apart. The northwestern summit vent is a symmetric cone with a small crater. The southeastern summit vent is on the remnant of a cone with a steep-walled crater, about 1 km wide at the rim and at least several hundred meters deep. Intercalated lava flows and pyroclastic rocks comprise the upper part of the crater wall, but the bottom one hundred meters or so are nearly vertical and apparently consist entirely of lava flows. A turquoise green lake fills the lower part of the crater; the color suggests the occurrence of solfataric activity [3] .
"The west side of Sarichef and east flank of Konia are extensively dissected; Konia has a relatively fresh cinder cone on its west flank. Sarichef is most likely a satellite vent of the earlier Atka volcano as is Kliuchef which is located on the northern rim of the Atka caldera. Korovin and Kliuchef are virtually undissected and are thus apparently of post-glacial age. Hot springs and fumaroles occur on the south and west flanks of Mt. Kliuchef and near the head of a glacial valley 6 km southwest of Korovin volcano [4] ."
Name Origin
Captain Lutke published the name "Korovinskoi Volcano" for "Korovin Volcano" in 1836 (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.

[2] 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.[3] Aleutian Islands National Wildlife Refuge, Wilderness Study Report, 1973
Sekora, P., 1973, Aleutian Islands National Wildlife Refuge, Wilderness Study Report: U.S. Department of the Interior, Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife.[4] 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.Current Activity
Recent Updates
Color Code Timeline
Reported Activity
0 Event Date(s)
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Map Images

Index map showing location of Korovin, in relation to Alaska and neighboring towns.

Location of Korovin volcano and other Aleutian volcanoes with respect to nearby cities and towns.
Map References
Historically active volcanoes of Alaska, v. 3, 2018
Historically active volcanoes of Alaska, 2014
Historically active volcanoes of the Aleutian Arc, 2002

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
Reconnaissance geology of some western Aleutian Islands, Alaska, 1956



Volcanic activity in the Aleutian Arc, 1950



Reconnaissance of the gold fields of southern Alaska with some notes on general geology, 1898


References
Alaska interagency operating plan for volcanic ash episodes, 2022







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Historically active volcanoes of Alaska, v. 4, 2020
2016 Volcanic activity in Alaska - Summary of events and response of the Alaska Volcano Observatory, 2020
The prevalence and significance of offset magma reservoirs at arc volcanoes, 2020
Global monitoring of volcanic SO2 degassing with unprecedented resolution from TROPOMI onboard Sentinel-5 Precursor, 2019
Catalog of earthquake parameters and description of seismograph and infrasound stations at Alaskan volcanoes - January 1, 2013, through December 31, 2017, 2019
A unified catalog of earthquake hypocenters and magnitudes at volcanoes in Alaska: 1989 to 2018, 2019
The Alaska Volcano Observatory: 30 years of protecting Alaskans from the effects of volcanic activity (1988-2018), 2018
The influence of tectonic environment on dynamic earthquake triggering: a review and case study on Alaskan volcanoes, 2018
2018 update to the U.S. Geological Survey national volcanic threat assessment, 2018
Historically active volcanoes of Alaska, v. 3, 2018
Historically active volcanoes of Alaska, 2016
2013 Volcanic activity in Alaska - summary of events and response of the Alaska Volcano Observatory, 2015
Historically active volcanoes of Alaska, 2014
Regional controls on volcano seismicity along the Aleutian Arc, 2014

Preliminary database of Quaternary vents in Alaska, 2014
InSAR imaging of Aleutian volcanoes, 2014
A volcanic activity alert-level system for aviation: review of its development and application in Alaska, 2013


Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2012, 2013


Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2011, 2012
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Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2010, 2011
Nonvolcanic tremor in the Aleutian Arc, 2011

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2009, 2010
Subduction controls of Hf and Nd isotopes in lavas of the Aleutian island arc, 2010

The role of water in generating the calc-alkaline trend: new volatile data for Aleutian magmas and a new tholeiitic index, 2010

2006 Volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory, 2009
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2008, 2009
Near-real-time volcanic ash cloud detection: Experiences from the Alaska Volcano Observatory, 2009

Historically active volcanoes of Alaska reference deck, 2009

Chronology and references of volcanic eruptions and selected unrest in the United States, 1980-2008, 2009
Preliminary spreadsheet of eruption source parameters for volcanoes of the world, 2009
2005 Volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory, 2008

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2006, 2008
The Alaska Volcano Observatory - 20 years of volcano research, monitoring, and eruption response, 2008


20th anniversary of the Alaska Volcano Observatory, 2008


Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2007, 2008
Satellite observations of the impact of weak volcanic activity on marine clouds, 2008

Along-strike trace element and isotopic variation in Aleutian Island arc basalt: subduction melts sediments and dehydrates serpentine, 2007

Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2005, 2006
Atka, 2006
Atka, 2006
Seismicity pattern: an indicator of source region of volcanism at convergent plate margins, 2004
Volcanoes of the world: an illustrated catalog of Holocene volcanoes and their eruptions, 2003
Bibliography of information on Alaska volcanoes, 2003
1998 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory, 2003


Interferometric synthetic aperture radar studies of Alaska volcanoes, 2003

Characterization of Holocene tephra deposits at Korovin Volcano, Atka Island, central Aleutians, USA, 2003
Along-strike variation in the Aleutian Island Arc: Genesis of high Mg# andesite and implications for continental crust, 2003

Petrologic constraints on the spatial distribution of crustal magma chambers, Atka volcanic center, central Aleutian Arc, 2002

The nature of melt inclusions inside minerals in ultramafic cumulates from island arcs; implications for the origin of high-Al basalts, 2002
Historically active volcanoes of the Aleutian Arc, 2002

Historically active volcanoes in Alaska, a quick reference, 2000


Encyclopedia of volcanoes, 2000

Operational implications of airborne volcanic ash, 2000

May-August 1999, 1999






Volcanic ash forecasting event over western Canada 1998-07-10: Operational response and forensic study, 1999
Volcanoes of Alaska, 1998

Catalog of the historically active volcanoes of Alaska, 1998



Atka, 1998
May-August 1998, 1998




September-December 1998, 1998






1996 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory, 1997


Atka, 1996
1993 volcanic activity in Alaska: summary of events and response of the Alaska Volcano Observatory, 1996


1995 volcanic activity in Alaska and Kamchatka: summary of events and response of the Alaska Volcano Observatory, 1996


Quick reference to Alaska's active volcanoes and listing of historical eruptions, 1760-1994, 1995
Atka, 1995
Volcanoes of Alaska, 1995
Dynamics of magma within the crust: a study using crystal size distributions, 1994
Age, character, and significance of Aleutian arc volcanism, 1994

Sr and Pb isotopic evidence for temporal and spatial controls on arc magmatic processes: new data from the central Aleutian Arc, 1994
Aleutian magmas in space and time, 1994
Geologic framework of the Aleutian arc, Alaska, 1994
Timing of large Holocene volcanic events in the western Aleutian Arc, Alaska, 1994
Volcanoes of the world [2nd edition], 1994
Geothermal resources of Alaska, 1994
The geology, geochemistry and petrology of the recent magmatic phase of the central and western Aleutian Arc, 1994

Notes on Russian America, Parts II-V: Kad'iak, Unalashka, Atkha, the Pribylovs (translated by Marina Ramsay), 1994
Crystal size distributions (CSDs) of plagioclase in a comagmatic sequence of basaltic lava flows from Atka Volcano, Alaska, 1993
Constraining the processes of magmatic evolution: perspectives from two volcanic centers, 1993
Geothermal resources of the Aleutian Arc, 1993

Constraints on arc magma chamber processes as recorded by plagioclase phenocrysts: the Atka volcanic center, central Aleutian arc, Alaska, 1993
Temperatures and H2O contents of low-MgO high-alumina basalts, 1993
Experimental investigations of the role of H2O in calc-alkaline differentiation and subduction zone magmatism, 1993
Atka, 1993
Holocene volcanoes of the Aleutian Arc, Alaska, 1993
Oxygen isotope constraints on the petrogenesis of Aleutian arc magmas, 1992
Field, geochemical, and experimental studies of aluminous arc magmas, 1991
Tholeiitic hydrothermal systems of the Aleutian volcanic arc, 1990
Late Quaternary vegetation of the Aleutian Islands, southwestern Alaska, 1990

Intra-arc extension and magmatic evolution in the central Aleutian arc, Alaska, 1990
Volcanoes of North America: United States and Canada, 1990
Korovin, 1990
Kliuchef, 1990
Trace and rare earth element constraints on the origin and evolution of Aleutian arc magmas, 1989
Intra-arc extension and magmatic evolution in the central Aleutian Arc, Alaska, 1989
Korovin, 1989
Korovin, 1988
Compositions of anhydrous and hydrous melts coexisting with plagioclase, augite, and olivine or low-Ca pyroxene from 1 atm to 8 kbar: application to the Aleutian volcanic center of Atka, 1987

Aleutian lead isotopic data: additional evidence for the evolution of lithospheric plumbing systems, 1987

Amphibole fractionation and magma mixing in andesites and dacites from the central Aleutians, Alaska, 1987

Atka, 1987
Geochemical and strontium isotopic characteristics of parental Aleutian Arc magmas: evidence from the basaltic lavas of Atka, 1986

Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Alaska, 1986
Atka, 1986
Strontium isotopic and selected trace element variations between two Aleutian volcanic centers (Adak and Atka): implications for the development of arc plumbing systems, 1985
Hydrothermal manifestations of the northern part of Atka Island of the Aleutian arc, and their geologic and tectonic setting, 1985
The compositions of melts coexisting with plagioclase, olivine, augite, orthopyroxene, and pigeonite at pressures from one atmosphere to 20 kbar and application to petrogenesis in intraoceanic island arcs, 1985
Chemical data from tertiary igneous rocks, Atka and Amlia Islands, Central Aleutian Arc, Alaska, 1985

Pb isotopic data from two Aleutian volcanic centers: additional evidence for the evolution of lithospheric plumbing systems, 1984
Reconnaissance geology of southern Atka Island, Aleutian Islands, Alaska, 1984


Alaska's resource inventory, 1984
Fractionation paths of Atka (Aleutians) high-alumina basalts: constraints from phase relations, 1983

Anhydrous phase relations of island arc high-alumina basalts from 1 bar to 20 kbar, 1982
(super 10) Be in island-arc volcanoes and implications for subduction, 1982
Holocene sea-level changes in the Aleutian Islands: new data from Atka Island, 1982
Intra- and inter-volcanic center isotopic variations: Adak and Atka, Aleutian Islands, Alaska, 1982
The Aleutians, 1982
A geomorphological reconnaissance of Atka, central Aleutian Islands, Alaska, 1982
Timing of Holocene geomorphic events on Atka Island, Aleutian Islands, 1981
Assessment of thermal springs sites, Aleutian arc, Atka Island to Becharof Lake-preliminary results and evaluation, 1981
Volcanoes of the world, 1981
Reconnaissance of thermal spring sites in the Aleutian Arc, Atka Island to Becharof Lake, 1981
Reconnaissance geology of Atka Island, central Aleutian Islands, Alaska, 1980
Geology and petrology of northern Atka, Aleutian Islands, Alaska, 1980
Around the world on the Kamchatka, 1817-1819 (translated from 1822 and 1965 versions by E.L. Wiswell), 1979
Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States, 1978
Aleutian/Pribilof Islands region community profiles, 1978
Account of a voyage of discovery to the north-east of Siberia, the frozen ocean, and the north-east sea, 1969
Alaska Peninsula-Aleutian Islands, 1958

Reconnaissance geology of some western Aleutian Islands, Alaska, 1956



Volcano observations, 1954
Aleutian volcanoes, 1952


The University of Michigan Expedition to the Aleutian Islands, 1948-49, 1950
Volcanic activity in the Aleutian Arc, 1950



Reconnaissance geology of some western Aleutian Islands, 1947
United States coast pilot, Alaska Part 2, Yakutat Bay to Arctic Ocean, 1947
Glaciers of the Aleutian Islands, 1945
Volcanoes declare war: logistics and strategy of Pacific volcano science, 1945
The Aleutian Islands, 1927


Reminiscences of Alaskan volcanoes, 1918

Katalog der geschichtlichen vulkanausbruche, 1917

The volcanoes of Alaska, 1910

Journal of the technology expedition to the Aleutian Islands, 1907, 1908

Recent volcanic eruptions in the Bering Sea, 1908

Reported volcanic eruptions in Alaska, Puget Sound, etc., 1690-1896, 1898

Reconnaissance of the gold fields of southern Alaska with some notes on general geology, 1898


Geological notes on some of the coasts and islands of the Bering Sea and vicinity, 1894
The volcanic region of Alaska, 1884


Alaska and its resources, 1870

Documents sur les tremblements de terre et les phenomenes volcaniques des iles Aleutiennes, de la peninsule d'Aljaska et de la cote no. d'Amerique, Extrait des memoires de l'Academie des sciences, arts et belles-lettres de Dijon, 1865, 1866

Grewingk's geology of Alaska and the Northwest Coast of America [edited by Marvin W. Falk, translation by Fritz Jaensch published 2003], 1850
Past volcanic activity in the Aleutian arc,


Volcano observations,

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)
During and After an Eruption
Ash Forecasting
Mathematical models developed by the USGS forecast various aspects of how a volcanic ash plume will interact with wind—where, how high, and how fast ash particles will be transported in the atmosphere, as well as where ash will fall out and accumulate on the ground. AVO runs these models when a volcano is restless by assuming a reasonable hypothetical eruption, to provide a pre-eruptive forecast of areas likely to be affected. During an ongoing eruption, AVO will update the forecast with actual observations (eruption start time and duration, plume height) as they become available.
View the current airborne ash cloud models for Korovin
Ashfall thickness forecast
The Ash3d model was developed by the USGS to forecast how a volcanic ash plume will interact with wind and where ash will fall out and accumulate on the ground. AVO runs these models twice daily when a volcano is restless by assuming a reasonable hypothetical eruption altitude and duration. The map shows the model results of ashfall thickness for areas that are likely to be affected, if one were to occur. During an ongoing eruption, AVO will update the forecast with actual observations (eruption start time and duration, plume height) as they become available, and these plots will be automatically updated. The National Weather Service Anchorage Forecast Office will issue the official ashfall warning product and post them at weather.gov/afc
THESE PRODUCTS MAY NOT BE CURRENT.During an actual eruption, see National Weather Service forecasts of ashfall:https://weather.gov/afc.
Ashfall Forecast
Ashfall Start Time
This map shows the modeled estimate of the time it would take for ashfall to begin following an eruption. It corresponds to the ashfall thickness forecast map shown above. This map uses the start time of either the twice-daily hypothetical model runs (time shown in the legend) or the actual eruption start time (if one were to occur). In the case of an actual eruption, the National Weather Service Anchorage Forecast Office will issue the official ashfall warning product that includes the ashfall start time and post them at weather.gov/afc
THESE PRODUCTS MAY NOT BE CURRENT.During an actual eruption, see National Weather Service forecasts of ashfall:https://weather.gov/afc.