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St. Andrew Strait

複成火山 · Papua New Guinea · 270m

The St. Andrew Strait volcano is located in the Admiralty Islands north of Papua New Guinea. The volcanic complex consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic deposits on Lou and Tuluman Islands. Volcanism is aligned along a curved arc, extending through the 12-km-long Lou Island. Tuluman Island, seen here from the SW with Lou Island 1.5 km away at the upper left, was formed during a 1953-57 eruption.
The St. Andrew Strait volcano is located in the Admiralty Islands north of Papua New Guinea. The volcanic complex consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic deposits on Lou and Tuluman Islands. Volcanism is aligned along a curved arc, extending through the 12-km-long Lou Island. Tuluman Island, seen here from the SW with Lou Island 1.5 km away at the upper left, was formed during a 1953-57 eruption. · 写真: Photo by Wally Johnson, 1964 (Australia Bureau of Mineral Resources).
タイプ
複成火山
国
Papua New Guinea
地域
南西太平洋 / Bismarck Sea Volcanic Province
標高
270m
座標
-2.380, 147.350
最終噴火
1957年
テクトニクス環境
Subduction zone / Oceanic crust (< 15 km)
火山地形
Composite
主要岩石
Rhyolite
地質学的概要

The St. Andrew Strait volcano, located in the Admiralty Islands north of Papua New Guinea, consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic materials on Lou and Tuluman Islands. Volcanism is aligned on a curved arc extending through the 12-km-long Lou Island. The Tuluman Islands, 1.5 km S of Lou Island, were formed during a 1953-1957 eruption. Pam Lin and Pam Mandian Islands farther to the SE along the same arc contain fresh rhyolitic obsidian similar to that found on Tuluman.

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
240 BCE~41 BCE · 1件 · 最大 VEI ?159~358 · 1件 · 最大 VEI ?1754~1953 · 3件 · 最大 VEI 2240 BCE35875713551754

詳細タイムライン

  1. 1953年VEI 2観測記録
    1953-06-27 ~ 1957-01-28
    Tuluman
  2. 1931年VEI 0地質学的推定
    1931-07-02 ~ 進行中
    Tuluman (?)
  3. 1883年VEI 2観測記録
    1883-03-28 ~ 進行中
    Tuluman
  4. 350年VEI ?地質学的推定
    350 ~ 進行中
    Lou Island (Bedal volcano)
  5. 紀元前 240年 (±100年)VEI ?地質学的推定
    BCE 240 ~ 進行中
    Lou Island (Bedal volcano)

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。