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Monte Augustine

Augustine

Domo de 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
Tipo
Domo de lava
País
United States
Región
América del Norte / Alaska Peninsula Volcanic Arc
Altitud
1218 m
Coordenadas
59.363, -153.435
Última erupción
2006
Contexto tectónico
Subduction zone / Continental crust (> 25 km)
Forma volcánica
Composite
Roca principal
Andesite / Basaltic Andesite
Resumen geológico

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.

Resumen de Wikipedia

Resumen en inglés

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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Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
5420 BCE~5172 BCE · 1 erupciones · VEI máx. ?4182 BCE~3935 BCE · 1 erupciones · VEI máx. ?2202 BCE~1955 BCE · 1 erupciones · VEI máx. ?1955 BCE~1707 BCE · 1 erupciones · VEI máx. ?470 BCE~222 BCE · 2 erupciones · VEI máx. ?222 BCE~25 · 1 erupciones · VEI máx. ?273~520 · 1 erupciones · VEI máx. ?520~768 · 1 erupciones · VEI máx. ?768~1015 · 1 erupciones · VEI máx. ?1015~1263 · 1 erupciones · VEI máx. ?1510~1758 · 2 erupciones · VEI máx. 41758~2005 · 9 erupciones · VEI máx. 45420 BCE3687 BCE1707 BCE251758

Línea de tiempo detallada

  1. 2005VEI 3Observado
    2005-12-09 – 2006-04-27
  2. 1986VEI 4Observado
    1986-03-27 – 1986-08-31
  3. 1976VEI 4Observado
    1976-01-22 – 1977-05-14
  4. 1971VEI 1Observado
    1971-10-07 – 1971-10-08
  5. 1963VEI 2Observado
    1963-10-11 – 1964-08-19
  6. 1935VEI 3Observado
    1935-03-13 – 1935-08-18
  7. 1908VEI 1Observado
    1908-07-02 – En curso
  8. 1883VEI 4Observado
    1883-10-06 – 1884-07-02
  9. 1812VEI 3Observado
    1812-07-02 – En curso
  10. 1650 (±100 años)VEI ?Estimación geológica
    1650 – En curso
  11. 1540 (±100 años)VEI 4Estimación geológica
    1540 – En curso
  12. 1230 (±50 años)VEI ?Estimación geológica
    1230 – En curso
  13. 930 (±150 años)VEI ?Estimación geológica
    930 – En curso
  14. 570 (±150 años)VEI ?Estimación geológica
    570 – En curso
  15. 340 (±40 años)VEI ?Estimación geológica
    340 – En curso
  16. 120 a. C. (±40 años)VEI ?Estimación geológica
    BCE 120 – En curso
  17. 310 a. C. (±100 años)VEI ?Estimación geológica
    BCE 310 – En curso
  18. 350 a. C. (±200 años)VEI ?Estimación geológica
    BCE 350 – En curso
  19. 1820 a. C. (±300 años)VEI ?Estimación geológica
    BCE 1820 – En curso
  20. 2040 a. C. (±300 años)VEI ?Estimación geológica
    BCE 2040 – En curso
  21. 4150 a. C. (±100 años)VEI ?Estimación geológica
    BCE 4150 – En curso
  22. 5420 a. C. (±50 años)VEI ?Estimación geológica
    BCE 5420 – En curso

Enlaces externos

⚠ Solo como referencia. No apto para respuesta ante emergencias.