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  • United States
  • Alaska
  • Stratovolcano
  • Unknown - Evidence Credible
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 53.157°N
  • 168.539°W

  • 1984 m
    6508 ft

  • 311280
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Recheschnoi.

The Global Volcanism Program has no Weekly Reports available for Recheschnoi.

The Global Volcanism Program has no Bulletin Reports available for Recheschnoi.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Credible

1984 m / 6508 ft


Volcano Types

Pyroclastic cone(s)
Lava dome(s)

Rock Types

Andesite / Basaltic Andesite
Basalt / Picro-Basalt

Tectonic Setting

Subduction zone
Intermediate crust (15-25 km)


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

The heavily glaciated, 1984-m-high Recheschnoi stratovolcano is located ENE of a roughly 900-m-high saddle across from Vsevidof volcano. Recheschnoi consists of an elongated, NE-SW-trending ridge that is dissected by deep glacier-filled valleys. Erosion is more extensive at the NE end. Holocene andesitic pyroclastic cones and rhyolitic lava domes, the latter west of the head of Russian Bay, are situated on the east and west flanks of the volcano. The Geyser Bight geothermal area on the NE flank of Recheschnoi is one of the hottest and most extensive thermal areas in Alaska. It consists of six zones of thermal springs and two fumarolic areas along upper Geyser Creek and contains the only known geysers in the state. Other thermal areas occur at Hot Springs Cove and Partov Cove on the rugged isthmus between Recheschnoi and Okmok volcanoes.


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Byers F M, 1959. Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska. U S Geol Surv Bull, 1028-L: 267-365.

Byers F M, 1961. Petrology of three volcanic suites, Umnak and Bogoslof Islands, Aleutian Island, Alaska. Geol Soc Amer Bull, 72: 93-128.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Motyka R J, Liss S A, Nye C J, Moorman M A, 1993. Geothermal resources of the Aleutian arc. Alaska Div Geol Geophys Surv, Prof Rpt, no 114, 17 p and 4 map sheets.

Myers J D, 1994. The Geology, Geochemistry and Petrology of the recent Magmatic Phase of the Central and Western Aleutian Arc. Unpublished manuscript, unpaginated.

Smith R L, Shaw H R, Luedke R G, Russell S L, 1978. Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States. U S Geol Surv Open-File Rpt, 78-925: 1-25.

Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.

The Global Volcanism Program is not aware of any Holocene eruptions from Recheschnoi. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Recheschnoi page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.




Feature Name Feature Type Elevation Latitude Longitude
Geyser Bight Geyser 53° 12' 51" N 168° 27' 36" W
Hot Springs Cove Hot Spring 53° 14' 41" N 168° 21' 39" W
Partov Cove Thermal 53° 13' 42" N 168° 18' 30" W

Photo Gallery

Russian Bay valley is located on the NE flank of the heavily eroded Recheschnoi volcano. Glacial dissection is most pronounced on the NE side. However, this side of the volcano also contains some Holocene rhyolitic lava domes and a large thermal area that includes a geyser.

Photo by Chris Nye (Alaska Division of Geological & Geophysical Surveys).
Mount Recheschnoi is a 1984-m stratovolcano on Umnak Island that has been extensively dissected by glaciers. This 1985 view from the SW shows the elongated NE-SW-trending summit ridge, which is dissected by deep valleys. Although no historical eruptions are known, Holocene pyroclastic cones and lava domes occur on the east and west flanks, and a large thermal area including hot springs and a geyser is found on the NE flank.

Photo by Chris Nye (Alaska Division of Geological & Geophysical Surveys).
The effects of erosion are visible in this view from the SW of two prominent stratovolcanoes on SW Umnak Island in the Aleutians. Mount Vsevidof (left) is a symmetrical, constructional volcano where frequent eruptions, which have continued into historical time, have overcome the effects of erosion. Recheschnoi volcano (right), in contrast, has been inactive for longer periods of time and has been extensively dissected by glaciers. Only small pyroclastic cones and lava domes have erupted during the past 10,000 years.

Photo by Chris Nye, 1985 (Alaska Division of Geological & Geophysical Surveys).

Smithsonian Sample Collections Database

There are no samples for Recheschnoi in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites

Large Eruptions of Recheschnoi Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.