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Mount Amukta

Amukta

Stratovolkan · United States · 1066 m

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. · Foto: Photo by U.S. Fish and Wildlife Service, 1972 (courtesy of Alaska Volcano Observatory). · Wikimedia Commons
Tipe
Stratovolkan
Negara
United States
Wilayah
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Ketinggian
1066 m
Koordinat
52.500, -171.252
Letusan terakhir
1996
Kondisi tektonik
Subduction zone / Intermediate crust (15-25 km)
Bentuk lahan
Composite
Batuan utama
Andesite / Basaltic Andesite
Ringkasan geologi

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.

Ringkasan Wikipedia

Ringkasan Inggris

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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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
1770~1793 · 2 letusan · VEI maks. 31861~1884 · 2 letusan · VEI maks. ?1952~1974 · 1 letusan · VEI maks. 31974~1997 · 3 letusan · VEI maks. 117701815188419291974

Garis waktu rinci

  1. 1997VEI 1Teramati
    1997-03-03 – Berlangsung
  2. 1996VEI 1Teramati
    1996-09-17 – 1996-09-18
  3. 1987VEI 1Teramati
    1987-09-04 – 1987-09-04
  4. 1963VEI 3Teramati
    1963-02-13 – Berlangsung
  5. 1878VEI ?Teramati
    1878 – Berlangsung
  6. 1876VEI ?Perkiraan geologi
    1876 – Berlangsung
  7. 1786VEI 3Teramati
    1786-06 – 1791
  8. 1770VEI ?Perkiraan geologi
    1770 – Berlangsung

Tautan eksternal

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