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Aracar

成層火山 · Argentina · 6095m

Aracar volcano in Argentina has a 1.5-km-wide summit crater in the center of this May 2019 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 22 km across). Lobate lava flows with pressure ridges are exposed along the lower southern flanks, and lava flows have been emplaced around topographic highs on the W, E, and S.
Aracar volcano in Argentina has a 1.5-km-wide summit crater in the center of this May 2019 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 22 km across). Lobate lava flows with pressure ridges are exposed along the lower southern flanks, and lava flows have been emplaced around topographic highs on the W, E, and S. · 写真: Satellite image courtesy of Planet Labs Inc., 2019 (https://www.planet.com/). · Wikimedia Commons
タイプ
成層火山
国
Argentina
地域
South America Volcanic Regions / Central Andean Volcanic Arc
標高
6095m
座標
-24.290, -67.783
最終噴火
不明
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

Aracar is a steep-sided stratovolcano with a youthful-looking summit crater 1-1.5 km in diameter that contains a small lake. It is located just east of the Argentina-Chile border. The volcano was constructed during three eruptive cycles dating back to the Pliocene. The andesitic stratovolcano overlies dacitic lava domes. Lava flows found at the base of the volcano below 4500 m elevation are relatively well preserved, but upper-flank lavas, often an indication of youthful activity, are not present (de Silva, 2007 pers. comm.). There were reports of possible ash columns from the summit in 1993, but it is not known whether these were rockfall dust or eruption plumes.

Wikipedia の要約

英語版の要約

Aracar is a large conical stratovolcano in northwestern Argentina, just east of the Chilean border. It has a main summit crater about 1–1.5 kilometres (0.6–0.9 mi) in diameter and sometimes contains crater lakes and a secondary crater. The volcano has formed, starting during the Pliocene, on top of a lava platform and an older basement. Constructed on a base with an altitude of 4,100 metres (13,500 ft), it covers a surface area of 192.4 square kilometres (74.3 sq mi) and has a volume of 148 cubic kilometres (36 cu mi). The only observed volcanic activity was a possible steam or ash plume on March 28, 1993, seen from the village of Tolar Grande about 50 km (31 mi) southeast of the volcano, but with no evidence of deformation of the volcano from satellite observations. Inca archeological sites are found on the volcano.

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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
1993~1993 · 1件 · 最大 VEI 219931993199419941994

詳細タイムライン

  1. 1993年VEI 2地質学的推定
    1993-03-28 ~ 進行中

外部リンク

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