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Monte Vsevidof

Vsevidof

Estratovolcán · United States · 2160 m

Mount Vsevidof is allocated on SW Umnak Island. The historically active volcano, seen here from the south, contains an E-W zone of scoria cones on the W flank that fed many lava flows, including a large flow that reached the west coast of the island and formed Cape Kigushimkada.
Mount Vsevidof is allocated on SW Umnak Island. The historically active volcano, seen here from the south, contains an E-W zone of scoria cones on the W flank that fed many lava flows, including a large flow that reached the west coast of the island and formed Cape Kigushimkada. · Foto: Photo by Chris Nye (Alaska Division of Geological & Geophysical Surveys). · Wikimedia Commons
Tipo
Estratovolcán
País
United States
Región
América del Norte / Aleutian Ridge Volcanic Arc
Altitud
2160 m
Coordenadas
53.126, -168.688
Última erupción
1878
Contexto tectónico
Subduction zone / Intermediate crust (15-25 km)
Forma volcánica
Composite
Roca principal
Andesite / Basaltic Andesite
Resumen geológico

The symmetrical Vsevidof stratovolcano, near the SW end of Umnak Island, contains a 1.2-km-wide, ice-filled summit crater that is breached by glaciers on the E and N sides. An E-W-trending zone of scoria cones that extends down much of the W flank has been the source of recorded eruptions. Most of the cone was constructed during the Holocene. Andesitic and dacitic lava flows originated from vents on the N and S flanks, and on the W-flank rift. The largest lava flow traveled down the W flank to the coast, forming Cape Kigushimkada.

Resumen de Wikipedia

Resumen en inglés

Mount Vsevidof is a stratovolcano in the U.S. state of Alaska. Its summit is the highest point on Umnak Island, one of the eastern Aleutian Islands. Its symmetrical cone rises abruptly from its surroundings. The base of the volcano is around 10 km (6 mi) wide, steepening from about 15 degrees at 300 m (980 ft) altitude to around 30 degrees near the summit. Some glacial tongues have cut through narrow canyons up to 120 m (390 ft) deep, due to ice filling the crater and extending down the north and east flanks of the cone. It is most likely that Mount Vsevidof has not erupted in historic time. Reports of its latest eruption in 1957 is considered questionable by the Alaska Volcano Observatory. This also includes possible eruptions or activity which may have occurred at the volcano in 1784, 1790, 1830, 1878, and 1880.

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Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
1784~1801 · 2 erupciones · VEI máx. ?1801~1819 · 1 erupciones · VEI máx. 31819~1836 · 1 erupciones · VEI máx. ?1871~1888 · 2 erupciones · VEI máx. 21940~1957 · 1 erupciones · VEI máx. 217841819187119051940

Línea de tiempo detallada

  1. 1957VEI 2Estimación geológica
    1957-03-11 – 1957-03-12
    West flank fissure
  2. 1880VEI ?Estimación geológica
    1880-07-02 – En curso
  3. 1878VEI 2Observado
    1878-07-02 – En curso
    West flank fissure ?
  4. 1830VEI ?Observado
    1830-07-02 – En curso
    SW end of Umnak Island
  5. 1817VEI 3Observado
    1817-07-02 – En curso
  6. 1790VEI ?Estimación geológica
    1790-05-30 – En curso
  7. 1784VEI ?Estimación geológica
    1784 – En curso

Enlaces externos

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