本文へスキップ
← 地図に戻る
⇄ 比較

ラウル島

Raoul Island

成層火山 · New Zealand · 516m

Anvil-shaped Raoul Island is the largest and northernmost of the Kermadec Islands. Two calderas are prominent in this International Space Station view with N to the upper right. The 2.5 x 3.5 km caldera cuts the center of the island, and the E wall of the partially submerged Denham Bay caldera rises above the smooth coastline at the left-center. The 6.5 x 4 km wide Denham Bay caldera formed during a major dacitic explosive eruption about 2,200 years ago, which truncated the W side of the island.
Anvil-shaped Raoul Island is the largest and northernmost of the Kermadec Islands. Two calderas are prominent in this International Space Station view with N to the upper right. The 2.5 x 3.5 km caldera cuts the center of the island, and the E wall of the partially submerged Denham Bay caldera rises above the smooth coastline at the left-center. The 6.5 x 4 km wide Denham Bay caldera formed during a major dacitic explosive eruption about 2,200 years ago, which truncated the W side of the island. · 写真: NASA International Space Station image ISS002-E-8883, 2001 (http://eol.jsc.nasa.gov/). · Wikimedia Commons
タイプ
成層火山
国
New Zealand
地域
Tonga-Kermadec Volcanic Regions / Northern Kermadec Volcanic Arc
標高
516m
座標
-29.270, -177.920
最終噴火
2006年
テクトニクス環境
Subduction zone / Oceanic crust (< 15 km)
火山地形
Composite
主要岩石
Andesite / Basaltic Andesite
地質学的概要

Anvil-shaped Raoul Island is the largest and northernmost of the Kermadec Islands. During the past several thousand years volcanism has been dominated by dacitic explosive eruptions. Two Holocene calderas exist, the older of which cuts the center the island and is about 2.5 x 3.5 km wide. Denham caldera, formed during a major dacitic explosive eruption about 2200 years ago, truncated the W side of the island and is 6.5 x 4 km wide. Its long axis is parallel to the tectonic fabric of the Havre Trough that lies W of the volcanic arc. Historical eruptions during the 19th and 20th centuries have sometimes occurred simultaneously from both calderas, and have consisted of small-to-moderate phreatic eruptions, some of which formed ephemeral islands in Denham caldera. An unnamed submarine cone, one of several located along a fissure on the lower NNE flank, has also erupted during historical time, and satellitic vents are concentrated along two parallel NNE-trending lineaments.

Wikipedia の要約

英語版の要約

Raoul Island is the largest and northernmost of the main Kermadec Islands, 900 km south south-west of 'Ata Island of Tonga and 1,100 km north north-east of New Zealand's North Island. It has been the source of vigorous volcanic activity during the past several thousand years that was dominated by dacitic explosive eruptions, with the largest being VEI-6.

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
2000 BCE~1809 BCE · 1件 · 最大 VEI 41237 BCE~1046 BCE · 1件 · 最大 VEI 4283 BCE~92 BCE · 1件 · 最大 VEI 692 BCE~98 · 1件 · 最大 VEI 398~289 · 1件 · 最大 VEI 4289~480 · 1件 · 最大 VEI 4480~671 · 1件 · 最大 VEI 4671~861 · 2件 · 最大 VEI 41434~1624 · 1件 · 最大 VEI ?1624~1815 · 3件 · 最大 VEI 41815~2006 · 5件 · 最大 VEI 32000 BCE1046 BCE92 BCE8611815

詳細タイムライン

  1. 2006年VEI 1観測記録
    2006-03-17 ~ 2006-03-17
    Green Lake crater
  2. 1987年VEI 0地質学的推定
    1987-03-25 ~ 1987-03-25
    NNE flank (7 km from Raoul Island)
  3. 1964年VEI 2観測記録
    1964-11-19 ~ 1965-04-25
    West side of Green Lake, Denham caldera
  4. 1886年VEI 0観測記録
    1886-03 ~ 進行中
    NNE flank (7.5 km from Raoul Island)
  5. 1870年VEI 3観測記録
    1870-06-20 ~ 1870-10-03
    Denham caldera, Green Lake
  6. 1814年VEI 3観測記録
    1814-03-09 ~ 進行中
    Denham caldera and Smith Crater
  7. 1720年 (±50年)VEI 4地質学的推定
    1720 ~ 進行中
    Denham Bay?, Tui Lake Crater
  8. 1630年 (±50年)VEI 4地質学的推定
    1630 ~ 進行中
    Rangitahua Crater
  9. 1450年VEI ?地質学的推定
    1450 ~ 進行中
    NE of Raoul Island (Meyer Islands)
  10. 850年VEI 4地質学的推定
    850 ~ 進行中
    Expedition Crater
  11. 700年VEI 3地質学的推定
    700 ~ 進行中
    Pukekohu Crater
  12. 550年VEI 4地質学的推定
    550 ~ 進行中
    Green Lake Pumice Crater
  13. 400年VEI 4地質学的推定
    400 ~ 進行中
    S part Raoul Caldera
  14. 100年VEI 4地質学的推定
    100 ~ 進行中
    N flank Moumoukai volcano
  15. 紀元前 50年VEI 3地質学的推定
    BCE 50 ~ 進行中
    Denham caldera?
  16. 紀元前 250年 (±75年)VEI 6地質学的推定
    BCE 250 ~ 進行中
    Denham caldera
  17. 紀元前 1200年 (±150年)VEI 4地質学的推定
    BCE 1200 ~ 進行中
    SW part of Raoul caldera
  18. 紀元前 2000年 (±100年)VEI 4地質学的推定
    BCE 2000 ~ 進行中
    SE Raoul caldera

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。