本文へスキップ
← 地図に戻る
⇄ 比較

ランゲル山

Wrangell

楯状火山 · 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. · 写真: Photo by B. Cella (National Park Service). · Wikimedia Commons
タイプ
楯状火山
国
United States
地域
North America Volcanic Regions / Wrangell Volcanic Arc
標高
4278m
座標
62.006, -144.017
最終噴火
1912年
テクトニクス環境
Intraplate / Continental crust (> 25 km)
火山地形
Shield
主要岩石
Andesite / Basaltic Andesite
地質学的概要

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 の要約

英語版の要約

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.

Wikipedia · CC BY-SA · 記事全文を読む →

噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
190~371 · 1件 · 最大 VEI 41640~1821 · 2件 · 最大 VEI 21821~2002 · 11件 · 最大 VEI 2190552109614581821

詳細タイムライン

  1. 2002年VEI 1観測記録
    2002-08-01 ~ 2002-08-02
  2. 1999年VEI 1観測記録
    1999-05-14 ~ 1999-05-14
  3. 1969年VEI 1観測記録
    1969-08-16 ~ 進行中
    West Crater
  4. 1930年VEI ?地質学的推定
    1930-06-30 ~ 進行中
  5. 1921年VEI ?地質学的推定
    1921-07-03 ~ 1921-07-03
    North flank?
  6. 1911年VEI 1観測記録
    1911-04-14 ~ 1912-09-14
  7. 1907年VEI ?地質学的推定
    1907-04-01 ~ 進行中
  8. 1902年VEI 2観測記録
    1902-07-15 ~ 進行中
    West Crater
  9. 1900年VEI 2観測記録
    1900-06 ~ 進行中
  10. 1899年VEI 2観測記録
    1899-09-03 ~ 進行中
  11. 1884年VEI 2地質学的推定
    1884-10-26 ~ 1885-02-04
  12. 1819年VEI 2地質学的推定
    1819 ~ 進行中
  13. 1784年VEI 2地質学的推定
    1784-07 ~ 進行中
  14. 190年 (±200年)VEI 4地質学的推定
    190 ~ 進行中

外部リンク

⚠ 参考情報です。緊急対応には使用しないでください。