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Mount Wrangell

Wrangell

순상화산 · United States · 4278m

Mount Wrangell, on the right skyline, is part of the Wrangell volcanic field. There are two large calderas at the summit and the inner ice-filled caldera contains three craters. Minor, possibly phreatic eruptions have occurred during the 20th century. To the left is rounded Mount Zanetti, a flank cone. The sharp-topped peak to the far-left of this view from the SW is a flank cone of the neighboring Pleistocene Mount Drum.
Mount Wrangell, on the right skyline, is part of the Wrangell volcanic field. There are two large calderas at the summit and the inner ice-filled caldera contains three craters. Minor, possibly phreatic eruptions have occurred during the 20th century. To the left is rounded Mount Zanetti, a flank cone. The sharp-topped peak to the far-left of this view from the SW is a flank cone of the neighboring Pleistocene Mount Drum. · 사진: Photo by B. Cella (National Park Service). · Wikimedia Commons
화산 유형
순상화산
국가
United States
지역
North America Volcanic Regions / Wrangell Volcanic Arc
해발
4278m
좌표
62.006, -144.017
마지막 분화
1912년
판구조 환경
Intraplate / Continental crust (> 25 km)
화산 지형
Shield
주요 암석
Andesite / Basaltic Andesite
지질학적 요약

Mount Wrangell is one of the world's largest continental-margin volcanoes, with a diameter of 30 km at 2,000 m elevation. The andesitic shield volcano has produced fluid lava flows as long as 58 km and contains an ice-filled caldera 4-6 km in diameter and 1 km deep, located within an older 15-km-wide caldera. Most of the edifice was constructed during eruptions between about 600,000 and 200,000 years ago. Formation of the summit caldera followed sometime between about 200,000 and 50,000 years ago. Three post-caldera craters are located at the broad summit, along the northern and western caldera rim. A steep-sided flank cinder cone, Mount Zanetti, is located 6 km NW of the summit. The westernmost cone has been the source of infrequent eruptions beginning in the 18th century. Increased heat flux in recent years has melted large volumes of ice in the northern crater.

Wikipedia 요약

영어 요약

Mount Wrangell, is a massive shield volcano located in Wrangell-St. Elias National Park and Preserve in southeastern Alaska, United States. The shield rises over 12,000 feet (3,700 m) above the Copper River to its southwest. Its volume is over 220 cubic miles (920 km3), making it more than twice as massive as Mount Shasta in California, the largest stratovolcano by volume in the Cascades. It is part of the Wrangell Mountains as well as the Wrangell Volcanic Field, which extends for more than 250 kilometers (160 mi) across Southcentral Alaska into the Yukon Territory in Canada, and has an eruptive history spanning the time from Pleistocene to Holocene.

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분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
190~371 · 1건 · 최고 VEI 41640~1821 · 2건 · 최고 VEI 21821~2002 · 11건 · 최고 VEI 2190552109614581821

상세 타임라인

  1. 2002년VEI 1관측 기록
    2002-08-01 ~ 2002-08-02
  2. 1999년VEI 1관측 기록
    1999-05-14 ~ 1999-05-14
  3. 1969년VEI 1관측 기록
    1969-08-16 ~ 진행 중
    West Crater
  4. 1930년VEI ?지질학적 추정
    1930-06-30 ~ 진행 중
  5. 1921년VEI ?지질학적 추정
    1921-07-03 ~ 1921-07-03
    North flank?
  6. 1911년VEI 1관측 기록
    1911-04-14 ~ 1912-09-14
  7. 1907년VEI ?지질학적 추정
    1907-04-01 ~ 진행 중
  8. 1902년VEI 2관측 기록
    1902-07-15 ~ 진행 중
    West Crater
  9. 1900년VEI 2관측 기록
    1900-06 ~ 진행 중
  10. 1899년VEI 2관측 기록
    1899-09-03 ~ 진행 중
  11. 1884년VEI 2지질학적 추정
    1884-10-26 ~ 1885-02-04
  12. 1819년VEI 2지질학적 추정
    1819 ~ 진행 중
  13. 1784년VEI 2지질학적 추정
    1784-07 ~ 진행 중
  14. 190년 (±200년)VEI 4지질학적 추정
    190 ~ 진행 중

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