Vai al contenuto principale
← Torna alla mappa
⇄ Confronta

Vulcano Akutan

Akutan

Stratovulcano · United States · 1303 m

Akutan has a 2-km-wide summit caldera with a large scoria cone that rises above the caldera rim. It is seen here from the south in eruption on 11 February 1987. A small lake occupies part of the caldera floor. The caldera rim is breached narrowly on the north side through which a 1978 lava flow traveled to within 2 km of the sea.
Akutan has a 2-km-wide summit caldera with a large scoria cone that rises above the caldera rim. It is seen here from the south in eruption on 11 February 1987. A small lake occupies part of the caldera floor. The caldera rim is breached narrowly on the north side through which a 1978 lava flow traveled to within 2 km of the sea. · Foto: Photo by Jerry Chisum (Mark Airways), 1987 (courtesy of John Reeder, Alaska Div. Geology & Geophysical Surveys). · Wikimedia Commons
Tipo
Stratovulcano
Paese
United States
Regione
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Altitudine
1303 m
Coordinate
54.134, -165.986
Ultima eruzione
1992
Contesto tettonico
Subduction zone / Intermediate crust (15-25 km)
Forma vulcanica
Composite
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

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.

Sintesi da Wikipedia

Il Vulcano Akutan è uno stratovulcano che occupa la parte occidentale dell'omonima isola, nelle Aleutine.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
7620 BCE~7300 BCE · 1 eruzioni · VEI max. ?4416 BCE~4096 BCE · 1 eruzioni · VEI max. ?70~390 · 1 eruzioni · VEI max. 5390~710 · 1 eruzioni · VEI max. ?1351~1672 · 1 eruzioni · VEI max. ?1672~1992 · 42 eruzioni · VEI max. 27620 BCE5377 BCE2814 BCE571 BCE1672

Cronologia dettagliata

  1. 1992VEI 2Osservata
    1992-03-08 – 1992-05-21
  2. 1992VEI 1Osservata
    1992-12-18 – 1992-12-18
  3. 1991VEI 2Osservata
    1991-09-15 – 1991-10-29
  4. 1990VEI 2Osservata
    1990-01-26 – 1990-01-26
  5. 1990VEI 2Osservata
    1990-09-06 – 1990-10-01
  6. 1989VEI 2Osservata
    1989-02-27 – 1989-03-28
  7. 1988VEI 2Osservata
    1988-03-26 – 1988-07-20
  8. 1987VEI 2Osservata
    1987-01-31 – 1987-06-24
  9. 1986VEI 2Osservata
    1986-03-18 – 1986-06-30
  10. 1982VEI 2Osservata
    1982-10-05 – 1983-05-16
  11. 1980VEI 2Osservata
    1980-07-03 – 1980-07-08
  12. 1978VEI 2Osservata
    1978-09-25 – 1978-10-16
  13. 1976VEI 2Osservata
    1976-10-15 – 1977-05-09
  14. 1974VEI 2Osservata
    1974-02-11 – In corso
    West flank ?
  15. 1973VEI 2Osservata
    1973-03-16 – 1973-05-16
  16. 1972VEI 2Stima geologica
    1972-09-16 – In corso
  17. 1962VEI 2Osservata
    1962-11-05 – In corso
  18. 1953VEI 2Osservata
    1953-07-02 – In corso
  19. 1951VEI 2Osservata
    1951-10-16 – In corso
  20. 1948VEI 2Osservata
    1948-04-29 – 1948-08-07
  21. 1946VEI 2Osservata
    1946-12 – 1947-01
  22. 1931VEI 2Osservata
    1931-05 – 1931-08
  23. 1929VEI 2Osservata
    1929-05 – In corso
  24. 1927VEI 2Osservata
    1927 – 1928
  25. 1912VEI ?Stima geologica
    1912 – In corso
  26. 1911VEI 2Osservata
    1911 – In corso
  27. 1908VEI 0Osservata
    1908-02-22 – In corso
  28. 1907VEI ?Osservata
    1907 – In corso
  29. 1896VEI ?Osservata
    1896 – In corso
  30. 1895VEI 2Osservata
    1895-08-01 – 1895-08-14
  31. 1892VEI 1Osservata
    1892-09-23 – In corso
  32. 1887VEI 0Osservata
    1887 – In corso
  33. 1883VEI 2Osservata
    1883 – In corso
  34. 1867VEI ?Osservata
    1867 – In corso
  35. 1865VEI ?Osservata
    1865 – In corso
  36. 1862VEI ?Stima geologica
    1862 – In corso
  37. 1852VEI ?Osservata
    1852 – In corso
    NW flank (Lava Point)
  38. 1848VEI 2Osservata
    1848-03-05 – In corso
  39. 1845VEI ?Stima geologica
    1845 – In corso
  40. 1838VEI ?Stima geologica
    1838 – In corso
  41. 1828VEI ?Stima geologica
    1828 – In corso
  42. 1790VEI ?Stima geologica
    1790 – In corso
  43. 1420 (±100 anni)VEI ?Stima geologica
    1420 – In corso
  44. 550VEI ?Stima geologica
    550 – In corso
  45. 340VEI 5Stima geologica
    340 – In corso
  46. 4150 a.C.VEI ?Stima geologica
    BCE 4150 – In corso
  47. 7620 a.C. (±300 anni)VEI ?Stima geologica
    BCE 7620 – In corso

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.