• Official Name: Koniuji Island
  • Seismically Monitored: No
  • Color Code: UNASSIGNED
  • Alert Level: UNASSIGNED
  • Elevation: 272m (892ft)
  • Latitude: 52.22144
  • Longitude: -175.13182
  • Smithsonian VNum: 311140
  • Pronunciation:
  • Nearby Towns:
    • Atka 39 mi (64 km) SE
    • Adak 68 mi (109 km) SW
    • Nikolski 268 mi (431 km) NE
    • Unalaska 375 mi (603 km) NE
    • Saint George 377 mi (606 km) NE

    Distance from Anchorage: 1130 mi (1818 km)


From Jicha (2009) [1] : Koniuji is a nascent stratovolcano, with 40Ar/39Ar ages that indicate subaerial lavas and domes erupted over the last 15,000 years, including at least three eruptions within the last 6000 years. It has an estimated volume of 1 cubic km, with approximately 25% of that volume subaerial. Dated products include older basaltic andesite lavas and younger andesite dome rocks.
Wood and Kienle (1990) [2] note that in 1981, "geologists from the USGS research vessel S.P. Lee landed in a small boat to collect samples. The collected rocks are from andesite flows, and pyroclastic deposits. A northeast-trending fault cuts the island on the southeast. A possible vent occurs just north of the highest point on the island."

Name Origin

Koniuji Island is named for the great number of crested auks called "Kanoozkhi" or "Kanooskie" by the early Russians, and which the Unangax call "Kunuliuk." Lieutenant Sarichev published the name as "O[strov] Kanyugi" in 1826 (Orth, 1971).

References Cited

[1] Holocene volcanic activity at Koniuji Island, Aleutians, 2009

Jicha, B.R., 2009, Holocene volcanic activity at Koniuji Island, Aleutians: Journal of Volcanology and Geothermal Research, v. 185, n. 3, p. 214-222.

[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.

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