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Mount Vsevidof

Vsevidof

성층화산 · United States · 2160m

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. · 사진: Photo by Chris Nye (Alaska Division of Geological & Geophysical Surveys). · Wikimedia Commons
화산 유형
성층화산
국가
United States
지역
북아메리카 / Aleutian Ridge Volcanic Arc
해발
2160m
좌표
53.126, -168.688
마지막 분화
1878년
판구조 환경
Subduction zone / Intermediate crust (15-25 km)
화산 지형
Composite
주요 암석
Andesite / Basaltic Andesite
지질학적 요약

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.

Wikipedia 요약

영어 요약

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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분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
1784~1801 · 2건 · 최고 VEI ?1801~1819 · 1건 · 최고 VEI 31819~1836 · 1건 · 최고 VEI ?1871~1888 · 2건 · 최고 VEI 21940~1957 · 1건 · 최고 VEI 217841819187119051940

상세 타임라인

  1. 1957년VEI 2지질학적 추정
    1957-03-11 ~ 1957-03-12
    West flank fissure
  2. 1880년VEI ?지질학적 추정
    1880-07-02 ~ 진행 중
  3. 1878년VEI 2관측 기록
    1878-07-02 ~ 진행 중
    West flank fissure ?
  4. 1830년VEI ?관측 기록
    1830-07-02 ~ 진행 중
    SW end of Umnak Island
  5. 1817년VEI 3관측 기록
    1817-07-02 ~ 진행 중
  6. 1790년VEI ?지질학적 추정
    1790-05-30 ~ 진행 중
  7. 1784년VEI ?지질학적 추정
    1784 ~ 진행 중

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