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Mount Veniaminof

Veniaminof

Stratovulcano · United States · 2507 m

A scoria cone on the Veniaminof western summit caldera floor was the source of the dark lava flow that melted through glacial ice. This photo was taken from the SE on 15 June 1984, two months after the eruption ended, and shows the rim of the 8 x 11 km wide caldera in the background. The caldera rim contains Cone Glacier on the west side (to the far left) and is overtopped by glaciers on the south and SE sides.
A scoria cone on the Veniaminof western summit caldera floor was the source of the dark lava flow that melted through glacial ice. This photo was taken from the SE on 15 June 1984, two months after the eruption ended, and shows the rim of the 8 x 11 km wide caldera in the background. The caldera rim contains Cone Glacier on the west side (to the far left) and is overtopped by glaciers on the south and SE sides. · Foto: Photo by Betsy Yount, 1984 (Alaska Volcano Observatory, U.S. Geological Survey). · Wikimedia Commons
Tipo
Stratovulcano
Paese
United States
Regione
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Altitudine
2507 m
Coordinate
56.170, -159.380
Ultima eruzione
2021
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

Veniaminof, on the Alaska Peninsula, is truncated by a steep-walled, 8 x 11 km, glacier-filled caldera that formed around 3,700 years ago. The caldera rim is up to 520 m high on the north, is deeply notched on the west by Cone Glacier, and is covered by an ice sheet on the south. Post-caldera vents are located along a NW-SE zone bisecting the caldera that extends 55 km from near the Bering Sea coast, across the caldera, and down the Pacific flank. Historical eruptions probably all originated from the westernmost and most prominent of two intra-caldera cones, which rises about 300 m above the surrounding icefield. The other cone is larger, and has a summit crater or caldera that may reach 2.5 km in diameter, but is more subdued and barely rises above the glacier surface.

Sintesi da Wikipedia

Riassunto in inglese

Mount Veniaminof is an active stratovolcano on the Alaska Peninsula. The mountain was named after Ioann Veniaminov.

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
1750 BCE~1552 BCE · 1 eruzioni · VEI max. 61823~2021 · 25 eruzioni · VEI max. 31750 BCE758 BCE3610291823

Cronologia dettagliata

  1. 2021VEI 1Osservata
    2021-02-28 – 2021-04-05
  2. 2018VEI 1Osservata
    2018-09-04 – 2018-12-23
    Intracaldera summit cone and its S flank
  3. 2013VEI 3Osservata
    2013-06-13 – 2013-10-12
    Western intracaldera cone and SE flank
  4. 2008VEI 1Osservata
    2008-02-22 – 2008-03-01
    Western intracaldera cone
  5. 2006VEI 1Osservata
    2006-03-03 – 2006-09-07
    Western intracaldera cone
  6. 2005VEI 2Osservata
    2005-01-04 – 2005-02-14
    Western intracaldera cone
  7. 2005VEI 1Osservata
    2005-09-07 – 2005-11-04
    Western intracaldera cone
  8. 2004VEI 2Osservata
    2004-02-16 – 2004-09-05
    Western intracaldera cone
  9. 2002VEI 1Osservata
    2002-09-24 – 2003-03-23
    Western intracaldera cone
  10. 1995VEI 1Osservata
    1995-04-17 – 1995-04-17
    Western intracaldera cone
  11. 1995VEI 1Osservata
    1995-11-15 – 1995-11-30
    Western intracaldera cone
  12. 1993VEI 2Osservata
    1993-07-30 – 1994-09-28
    Western cone and Half Cone
  13. 1987VEI 1Osservata
    1987-03-19 – 1987-03-19
    Western intracaldera cone
  14. 1984VEI 2Osservata
    1984-11-29 – 1984-12-06
    Western intracaldera cone
  15. 1983VEI 3Osservata
    1983-06-02 – 1984-04-17
    Western intracaldera cone
  16. 1956VEI 3Osservata
    1956-03-16 – 1956-05-23
    Western intracaldera cone
  17. 1944VEI 2Osservata
    1944-03-28 – In corso
    Western intracaldera cone
  18. 1939VEI 3Osservata
    1939-05-23 – 1939-06-26
    Western intracaldera cone
  19. 1939VEI 2Osservata
    1939-11 – In corso
    Western intracaldera cone
  20. 1930VEI 2Osservata
    1930-06 – In corso
    Western intracaldera cone
  21. 1892VEI 3Osservata
    1892-08-28 – 1892-08-30
    Western intracaldera cone
  22. 1874VEI 2Osservata
    1874-07-15 – In corso
    Western intracaldera cone
  23. 1852VEI 2Stima geologica
    1852 – In corso
    Western intracaldera cone
  24. 1838VEI 3Osservata
    1838-08-04 – 1839-04
    Western intracaldera cone
  25. 1830VEI 2Stima geologica
    1830 – 1838
  26. 1750 a.C.VEI 6Stima geologica
    BCE 1750 – In corso

Link esterni

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