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Gunung berapi Augustine

Augustine

Kubah lava · United States · 1218 m

Augustine in Kamishak Bay in the southern Cook Inlet is the most active volcano of the eastern Aleutian arc. It consists of a complex of overlapping summit lava domes surrounded by an apron of volcaniclastic deposits that descend to the sea on all sides. This 1986 view from the NW shows Augustine reflected in a shallow lagoon separating the small west island from the main island. Twentieth-century eruptions have included explosive activity with pyroclastic flows and lava dome growth.
Augustine in Kamishak Bay in the southern Cook Inlet is the most active volcano of the eastern Aleutian arc. It consists of a complex of overlapping summit lava domes surrounded by an apron of volcaniclastic deposits that descend to the sea on all sides. This 1986 view from the NW shows Augustine reflected in a shallow lagoon separating the small west island from the main island. Twentieth-century eruptions have included explosive activity with pyroclastic flows and lava dome growth. · Foto: Photo by Lee Siebert, 1986 (Smithsonian Institution). · Wikimedia Commons
Tipe
Kubah lava
Negara
United States
Wilayah
North America Volcanic Regions / Alaska Peninsula Volcanic Arc
Ketinggian
1218 m
Koordinat
59.363, -153.435
Letusan terakhir
2006
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Andesite / Basaltic Andesite
Ringkasan geologi

Augustine volcano, rising above Kamishak Bay in the southern Cook Inlet about 290 km SW of Anchorage, is the most active volcano of the eastern Aleutian arc. It consists of a complex of overlapping summit lava domes surrounded by an apron of volcaniclastic debris that descends to the sea on all sides. Few lava flows are exposed; the flanks consist mainly of debris-avalanche and pyroclastic-flow deposits formed by repeated collapse and regrowth of the summit. The latest episode of edifice collapse occurred during Augustine's large 1883 eruption; subsequent dome growth has restored the edifice to a height comparable to that prior to 1883. The oldest dated volcanic rocks on Augustine are more than 40,000 years old. At least 11 large debris avalanches have reached the sea during the past 1,800-2,000 years, and five major pumiceous tephras have been erupted during this interval. Recorded eruptions have typically consisted of explosive activity with emplacement of pumiceous pyroclastic-flow deposits followed by lava dome extrusion with associated block-and-ash flows.

Ringkasan Wikipedia

Ringkasan Inggris

Augustine Volcano is a stratovolcano in Alaska consisting of a central complex of summit lava domes and flows surrounded by an apron of pyroclastic, lahar, avalanche, and ash deposits. The volcano forms Augustine Island, colloquially called Mount St. Augustine, in southwestern Cook Inlet in the Kenai Peninsula Borough of southcentral coastal Alaska, about 70 miles (113 km) west of Homer and about 175 miles (282 km) southwest of Anchorage.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
5420 BCE~5172 BCE · 1 letusan · VEI maks. ?4182 BCE~3935 BCE · 1 letusan · VEI maks. ?2202 BCE~1955 BCE · 1 letusan · VEI maks. ?1955 BCE~1707 BCE · 1 letusan · VEI maks. ?470 BCE~222 BCE · 2 letusan · VEI maks. ?222 BCE~25 · 1 letusan · VEI maks. ?273~520 · 1 letusan · VEI maks. ?520~768 · 1 letusan · VEI maks. ?768~1015 · 1 letusan · VEI maks. ?1015~1263 · 1 letusan · VEI maks. ?1510~1758 · 2 letusan · VEI maks. 41758~2005 · 9 letusan · VEI maks. 45420 BCE3687 BCE1707 BCE251758

Garis waktu rinci

  1. 2005VEI 3Teramati
    2005-12-09 – 2006-04-27
  2. 1986VEI 4Teramati
    1986-03-27 – 1986-08-31
  3. 1976VEI 4Teramati
    1976-01-22 – 1977-05-14
  4. 1971VEI 1Teramati
    1971-10-07 – 1971-10-08
  5. 1963VEI 2Teramati
    1963-10-11 – 1964-08-19
  6. 1935VEI 3Teramati
    1935-03-13 – 1935-08-18
  7. 1908VEI 1Teramati
    1908 – Berlangsung
  8. 1883VEI 4Teramati
    1883-10-06 – 1884
  9. 1812VEI 3Teramati
    1812 – Berlangsung
  10. 1650 (±100 tahun)VEI ?Perkiraan geologi
    1650 – Berlangsung
  11. 1540 (±100 tahun)VEI 4Perkiraan geologi
    1540 – Berlangsung
  12. 1230 (±50 tahun)VEI ?Perkiraan geologi
    1230 – Berlangsung
  13. 930 (±150 tahun)VEI ?Perkiraan geologi
    930 – Berlangsung
  14. 570 (±150 tahun)VEI ?Perkiraan geologi
    570 – Berlangsung
  15. 340 (±40 tahun)VEI ?Perkiraan geologi
    340 – Berlangsung
  16. 120 SM (±40 tahun)VEI ?Perkiraan geologi
    BCE 120 – Berlangsung
  17. 310 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 310 – Berlangsung
  18. 350 SM (±200 tahun)VEI ?Perkiraan geologi
    BCE 350 – Berlangsung
  19. 1820 SM (±300 tahun)VEI ?Perkiraan geologi
    BCE 1820 – Berlangsung
  20. 2040 SM (±300 tahun)VEI ?Perkiraan geologi
    BCE 2040 – Berlangsung
  21. 4150 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 4150 – Berlangsung
  22. 5420 SM (±50 tahun)VEI ?Perkiraan geologi
    BCE 5420 – Berlangsung

Tautan eksternal

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