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Yantarni Volcano

Yantarni

成層火山 · United States · 1345m

Yantarni is located on the Alaska Peninsula, with this view from the east showing the lava dome at the summit. On either side of the dome are remnants of a large crater that opens to the NE, which formed during flank collapse about 2,000-3,500 years ago.
Yantarni is located on the Alaska Peninsula, with this view from the east showing the lava dome at the summit. On either side of the dome are remnants of a large crater that opens to the NE, which formed during flank collapse about 2,000-3,500 years ago. · 写真: Photo by Tom Miller, 1985 (Alaska Volcano Observatory, U.S. Geological Survey). · Wikimedia Commons
タイプ
成層火山
国
United States
地域
North America Volcanic Regions / Alaska Peninsula Volcanic Arc
標高
1345m
座標
57.019, -157.185
最終噴火
-800年
テクトニクス環境
Subduction zone / Continental crust (> 25 km)
火山地形
Composite
主要岩石
Andesite / Basaltic Andesite
地質学的概要

Yantarni is a small andesitic stratovolcano located between Aniakchak caldera and Chiginadak volcanoes that was not discovered until 1979. A large breached crater on the NE side, formed by collapse of the summit about 2000-3500 years ago, contains a lava dome that marks the summit. This eruption, which resembled that of Mount St. Helens in 1980, began with a debris avalanche produced by the edifice collapse that was accompanied by a possible lateral blast and followed by the emplacement of 1 km3 of pyroclastic flows related to growth of the summit lava dome.

Wikipedia の要約

英語版の要約

Yantarni Volcano is an andesitic stratovolcano in the U.S. state of Alaska. It is on the Alaska Peninsula, in the Aleutian Range, between Mount Aniakchak and Mount Chiginagak volcanoes. The volcano was not discovered until 1979 due to its remote location, lack of documented historic activity, and its rather modest summit elevation. The mountain was named after nearby Yantarni Bay, which in turn was named by Russian explorers after the abundance of amber in the area.

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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
800 BCE~800 BCE · 1件 · 最大 VEI 5800 BCE800 BCE799 BCE799 BCE799 BCE

詳細タイムライン

  1. 紀元前 800年 (±500年)VEI 5地質学的推定
    BCE 800 ~ 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。