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Estados Unidos · Estratovolcán

Akutan

Tipo
Estratovolcán
Altitud
1303 m
Última erupción
1992
Akutan
Public domain · Wikimedia Commons
Tipo
Estratovolcán
País
Estados Unidos
Región
América del Norte / Aleutian Ridge Volcanic Arc
Altitud
1303 m
Coordenadas
54.134, -165.986
Última erupción
1992
Contexto tectónico
Zona de subducción / Corteza intermedia (15-25 km)
Forma volcánica
Compuesto
Roca principal
Basalto / Picrobasalto
Resumen geológico

Akutan contains a 2-km-wide caldera with a large cinder cone in the NE part of the caldera that has been the source of frequent explosive eruptions and occasional lava effusion that covers the caldera floor. An older, largely buried caldera was formed during the late Pleistocene or early Holocene. Two volcanic centers are located on the NW flank. Lava Peak is of Pleistocene age, and a cinder cone lower on the flank produced a lava flow in 1852 that extended the shoreline of the island and forms Lava Point. The 60-365 m deep younger caldera was formed during a major explosive eruption about 1,600 years ago and contains at least three lakes. A lava flow in 1978 traveled through a narrow breach in the north caldera rim almost to the coast. Fumaroles occur at the base of the caldera cinder cone, and hot springs are located NE of the caldera at the head of Hot Springs Bay valley and along the shores of Hot Springs Bay.

Resumen de Wikipedia

Resumen en inglés

Mount Akutan, officially Akutan Peak, is a stratovolcano in the Aleutian Islands of Alaska. Akutan Peak, at 4,275 feet (1,303 m), is the highest point on the caldera of the Akutan stratovolcano. Akutan contains a 2 km-wide caldera formed during a major explosive eruption about 1600 years ago. Recent eruptive activity has originated from a large cinder cone on the NE part of the caldera. It has been the source of frequent explosive eruptions with occasional lava effusion that blankets the caldera floor. A lava flow in 1978 traveled through a narrow breach in the north caldera rim to within 2 km of the coast. A small lake occupies part of the caldera floor. Two volcanic centers are located on the NW flank: Lava Peak is of Pleistocene age; and, a cinder cone lower on the flank which produced a lava flow in 1852 that extended the shoreline of the island and forms Lava Point. An older, mostly buried caldera seems to have formed in Pleistocene or Holocene time, while the current caldera formed in a VEI-5 eruption c. 340 AD. AVO has recorded 33 confirmed eruptions at Akutan, making it the volcano with the most eruptions in Alaska.

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Historial de erupciones

47 registradasGlosario
Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales · Usa las flechas para moverte entre barras y Enter para abrir
7620 a. C.~7300 a. C. · 1 erupciones · VEI máx. ?4416 a. C.~4096 a. C. · 1 erupciones · VEI máx. ?70~390 · 1 erupciones · VEI máx. 5390~710 · 1 erupciones · VEI máx. ?1351~1672 · 1 erupciones · VEI máx. ?1672~1992 · 42 erupciones · VEI máx. 27620 a. C.5377 a. C.2814 a. C.571 a. C.1672

Línea de tiempo detallada

  1. 1992VEI 2Observado
    1992-03-08 – 1992-05-21
  2. 1992VEI 1Observado
    1992-12-18 – 1992-12-18
  3. 1991VEI 2Observado
    1991-09-15 – 1991-10-29
  4. 1990VEI 2Observado
    1990-01-26 – 1990-01-26
  5. 1990VEI 2Observado
    1990-09-06 – 1990-10-01
  6. 1989VEI 2Observado
    1989-02-27 – 1989-03-28
  7. 1988VEI 2Observado
    1988-03-26 – 1988-07-20
  8. 1987VEI 2Observado
    1987-01-31 – 1987-06-24
  9. 1986VEI 2Observado
    1986-03-18 – 1986-06-30
  10. 1982VEI 2Observado
    1982-10-05 – 1983-05-16
  11. 1980VEI 2Observado
    1980-07-03 – 1980-07-08
  12. 1978VEI 2Observado
    1978-09-25 – 1978-10-16
  13. 1976VEI 2Observado
    1976-10-15 – 1977-05-09
  14. 1974VEI 2Observado
    1974-02-11 – fin desconocido
    West flank ?
  15. 1973VEI 2Observado
    1973-03-16 – 1973-05-16
  16. 1972VEI 2Método no indicado
    1972-09-16 – fin desconocido
  17. 1962VEI 2Observado
    1962-11-05 – fin desconocido
  18. 1953VEI 2Observado
    1953-07-02 – fin desconocido
  19. 1951VEI 2Observado
    1951-10-16 – fin desconocido
  20. 1948VEI 2Observado
    1948-04-29 – 1948-08-07
  21. 1946VEI 2Observado
    1946-12-16 – 1947-01-16
  22. 1931VEI 2Observado
    1931-05-16 – 1931-08-16
  23. 1929VEI 2Observado
    1929-05-16 – fin desconocido
  24. 1927VEI 2Observado
    1927-07-02 – 1928-07-02
  25. 1912VEI ?Método no indicado
    1912-07-02 – fin desconocido
  26. 1911VEI 2Observado
    1911-07-02 – fin desconocido
  27. 1908VEI 0Observado
    1908-02-22 – fin desconocido
  28. 1907VEI ?Observado
    1907-07-02 – fin desconocido
  29. 1896VEI ?Observado
    1896-07-02 – fin desconocido
  30. 1895VEI 2Observado
    1895-08-01 – 1895-08-14
  31. 1892VEI 1Observado
    1892-09-23 – fin desconocido
  32. 1887VEI 0Observado
    1887-07-02 – fin desconocido
  33. 1883VEI 2Observado
    1883-07-02 – fin desconocido
  34. 1867VEI ?Observado
    1867-07-02 – fin desconocido
  35. 1865VEI ?Observado
    1865-07-02 – fin desconocido
  36. 1862VEI ?Método no indicado
    1862-07-02 – fin desconocido
  37. 1852VEI ?Observado
    1852-07-02 – fin desconocido
    NW flank (Lava Point)
  38. 1848VEI 2Observado
    1848-03-05 – fin desconocido
  39. 1845VEI ?Método no indicado
    1845-07-02 – fin desconocido
  40. 1838VEI ?Método no indicado
    1838-07-02 – fin desconocido
  41. 1828VEI ?Método no indicado
    1828-07-02 – fin desconocido
  42. 1790VEI ?Método no indicado
    1790 – fin desconocido
  43. 1420 (±100 años)VEI ?Estimación geológica
    1420 – fin desconocido
  44. 550VEI ?Estimación geológica
    550 – fin desconocido
  45. 340VEI 5Estimación geológica
    340 – fin desconocido
  46. 4150 a. C.VEI ?Estimación geológica
    4150 a. C. – fin desconocido
  47. 7620 a. C. (±300 años)VEI ?Estimación geológica
    7620 a. C. – fin desconocido

Volcanes cercanos

Enlaces externos

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