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Mount Amukta

Amukta

成層火山 · United States · 1066m

Amukta in the central Aleutians is located along the coast of the 8-km-wide island of the same name. It has had several eruptions since the late 18th century from both summit and flank vents.
Amukta in the central Aleutians is located along the coast of the 8-km-wide island of the same name. It has had several eruptions since the late 18th century from both summit and flank vents. · 写真: Photo by U.S. Fish and Wildlife Service, 1972 (courtesy of Alaska Volcano Observatory). · Wikimedia Commons
タイプ
成層火山
国
United States
地域
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
標高
1066m
座標
52.500, -171.252
最終噴火
1996年
テクトニクス環境
Subduction zone / Intermediate crust (15-25 km)
火山地形
Composite
主要岩石
Andesite / Basaltic Andesite
地質学的概要

The symmetrical Amukta stratovolcano lies in the central Aleutians SW of Chagulak Island and is the westernmost of the Islands of the Four Mountains group. The stratovolcano was constructed at the northern side of an arcuate caldera-like feature that is open to the sea along the southern coast of the 8-km-wide Amukta Island. It overlies a broad shield volcano and is topped by a 400-m-wide crater, and a cinder cone is located near the NE coast. There have been several reported eruptions from both summit and flank vents.

Wikipedia の要約

英語版の要約

The undissected stratovolcano of Amukta volcano makes up most of nearly circular, 7.7-km-wide Amukta Island. It is the westernmost of the Islands of Four Mountains chain. The nearest islands to it are Yunaska and Seguam Island; it is separated from Seguam Island by Amukta Pass. The cone, about 5.8 km in basal diameter and topped by a 0.4 km wide summit crater, appears on synthetic-aperture radar imagery to be built upon a 300+ meter high, east-west trending arcuate ridge.

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噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
1770~1793 · 2件 · 最大 VEI 31861~1884 · 2件 · 最大 VEI ?1952~1974 · 1件 · 最大 VEI 31974~1997 · 3件 · 最大 VEI 117701815188419291974

詳細タイムライン

  1. 1997年VEI 1観測記録
    1997-03-03 ~ 進行中
  2. 1996年VEI 1観測記録
    1996-09-17 ~ 1996-09-18
  3. 1987年VEI 1観測記録
    1987-09-04 ~ 1987-09-04
  4. 1963年VEI 3観測記録
    1963-02-13 ~ 進行中
  5. 1878年VEI ?観測記録
    1878 ~ 進行中
  6. 1876年VEI ?地質学的推定
    1876 ~ 進行中
  7. 1786年VEI 3観測記録
    1786-06 ~ 1791
  8. 1770年VEI ?地質学的推定
    1770 ~ 進行中

外部リンク

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