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ネバドデルルイス火山

Ruiz, Nevado del

成層火山 · Colombia · 5279m

Nevado del Ruiz is a broad glacier-covered volcano that covers more than 200 km2. The modern cone consists of a cluster of lava domes constructed within the summit caldera of an older edifice. The ash-mantled summit is seen here from the ESE on 18 December 1985, a little more than a month after the catastrophic eruption of 13 November. The devastating 1985 lahars swept down four major river drainages that day and caused around 24,000 fatalities.
Nevado del Ruiz is a broad glacier-covered volcano that covers more than 200 km2. The modern cone consists of a cluster of lava domes constructed within the summit caldera of an older edifice. The ash-mantled summit is seen here from the ESE on 18 December 1985, a little more than a month after the catastrophic eruption of 13 November. The devastating 1985 lahars swept down four major river drainages that day and caused around 24,000 fatalities. · 写真: Photo by Norm Banks, 1985 (U.S. Geological Survey). · Wikimedia Commons
タイプ
成層火山
国
Colombia
地域
南アメリカ / Northern Andean Volcanic Arc
標高
5279m
座標
4.892, -75.324
最終噴火
2026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

Nevado del Ruiz is a broad, glacier-covered volcano in central Colombia that covers more than 200 km2. Three major edifices, composed of andesitic and dacitic lavas and andesitic pyroclastics, have been constructed since the beginning of the Pleistocene. The modern cone consists of a broad cluster of lava domes built within the caldera of an older edifice. The 1-km-wide, 240-m-deep Arenas crater occupies the summit. The prominent La Olleta pyroclastic cone located on the SW flank may also have been active in historical time. Steep headwalls of massive landslides cut the flanks. Melting of its summit icecap during historical eruptions, which date back to the 16th century, has resulted in devastating lahars, including one in 1985 that was South America's deadliest eruption.

Wikipedia の要約

英語版の要約

Nevado del Ruiz, also known as La Mesa de Herveo is a volcano on the border of the departments of Caldas and Tolima in Colombia, being the highest point of both. It is located about 130 km (81 mi) west of the capital city Bogotá. It is a stratovolcano composed of many layers of lava alternating with hardened volcanic ash and other pyroclastic rocks. Volcanic activity at Nevado del Ruiz began about two million years ago, during the Early Pleistocene or Late Pliocene, with three major eruptive periods. The current volcanic cone formed during the present eruptive period, which began 150,000 years ago.

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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
6660 BCE~6371 BCE · 1件 · 最大 VEI ?1456 BCE~1166 BCE · 1件 · 最大 VEI ?877 BCE~588 BCE · 1件 · 最大 VEI 4299 BCE~10 BCE · 1件 · 最大 VEI 4279~568 · 1件 · 最大 VEI 3568~857 · 1件 · 最大 VEI 31147~1436 · 1件 · 最大 VEI 41436~1725 · 4件 · 最大 VEI 41725~2014 · 13件 · 最大 VEI 36660 BCE4636 BCE2323 BCE299 BCE1725

詳細タイムライン

  1. 2014年VEI 2観測記録
    2014-11-18 ~ 2026-03-16
    Arenas crater
  2. 2012年VEI 3観測記録
    2012-02-22 ~ 2013-07-12
    Arenas Crater
  3. 1994年VEI ?地質学的推定
    1994-04-23 ~ 1994-04-23
  4. 1985年VEI 3観測記録
    1985-09-11 ~ 1991-07-13
    Arenas Crater
  5. 1984年VEI 1観測記録
    1984-12-22 ~ 1985-03-19
    Arenas Crater
  6. 1916年VEI 2観測記録
    1916-07-02 ~ 進行中
  7. 1845年VEI 3観測記録
    1845-02-19 ~ 進行中
    Arenas and La Olleta(?) craters
  8. 1833年VEI 2地質学的推定
    1833-07-02 ~ 進行中
  9. 1831年VEI 2観測記録
    1831-07-02 ~ 進行中
  10. 1829年VEI 2観測記録
    1829-06-18 ~ 進行中
  11. 1828年VEI 2観測記録
    1828-06-16 ~ 進行中
  12. 1826年VEI 2地質学的推定
    1826-07-02 ~ 進行中
  13. 1805年VEI 2観測記録
    1805-03-14 ~ 進行中
  14. 1623年VEI 1観測記録
    1623 ~ 進行中
    Near Arenas Crater
  15. 1595年VEI 4観測記録
    1595-03-09 ~ 進行中
    Arenas Crater
  16. 1570年VEI ?観測記録
    1570 ~ 進行中
    Arenas Crater?
  17. 1541年VEI ?地質学的推定
    1541 ~ 進行中
  18. 1350年VEI 4地質学的推定
    1350 ~ 進行中
    Arenas Crater
  19. 675年 (±50年)VEI 3地質学的推定
    675 ~ 進行中
    Arenas Crater
  20. 350年 (±300年)VEI 3地質学的推定
    350 ~ 進行中
    West flank
  21. 紀元前 200年 (±100年)VEI 4地質学的推定
    BCE 200 ~ 進行中
    Arenas Crater
  22. 紀元前 850年VEI 4地質学的推定
    BCE 850 ~ 進行中
    Arenas Crater
  23. 紀元前 1245年 (±150年)VEI ?地質学的推定
    BCE 1245 ~ 進行中
    ENE flank ? (Alto la Piramide ?)
  24. 紀元前 6660年VEI ?地質学的推定
    BCE 6660 ~ 進行中
    Arenas Crater

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。