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Mount Alayta

Alayta

楯状火山 · Ethiopia · 1496m

Alayta shield volcano (left-center) covers an area of 2,700 km2 in the western Danakil depression. A series of recent craters is aligned along the NNW-trending axis. The Alayta lava field (center dark area) was erupted from N-S-trending fissures along the E side of the volcano and reaches the W flank of Afderà volcano, immediately S of Lake Guilietti (Lake Afrera) at the upper right-center.
Alayta shield volcano (left-center) covers an area of 2,700 km2 in the western Danakil depression. A series of recent craters is aligned along the NNW-trending axis. The Alayta lava field (center dark area) was erupted from N-S-trending fissures along the E side of the volcano and reaches the W flank of Afderà volcano, immediately S of Lake Guilietti (Lake Afrera) at the upper right-center. · 写真: NASA Landsat image, 1999 (courtesy of Hawaii Synergy Project, Univ. of Hawaii Institute of Geophysics & Planetology). · Wikimedia Commons
タイプ
楯状火山
国
Ethiopia
地域
Eastern Africa Volcanic Regions / Afar Rift Volcanic Province
標高
1496m
座標
12.888, 40.573
最終噴火
1915年
テクトニクス環境
Rift zone / Intermediate crust (15-25 km)
火山地形
Shield
主要岩石
Basalt / Picro-Basalt
地質学的概要

The massive Alayta shield volcano covers an area of 2700 km2 in the western Danakil depression SW of Lake Afrera. A series of very recent craters is aligned along the NNW-trending axis of the basaltic-to-trachytic shield. The lava field, covered by very fresh flows, was erupted from N-S fissures along the east side of the shield volcano and laps up against the western flank of Afderà volcano. Two historical eruptions that were formerly attributed to Afderà actually originated from Alayta. One of those eruptions, in 1907, produced a large lava flow from a SE-flank vent. Fumarolic activity occurs at two locations in the southern part of the complex.

Wikipedia の要約

英語版の要約

Mount Alayta is an active shield volcano in the Afar Region of Ethiopia. It is part of the Afar Triangle, a highly active volcanic region which includes the adjacent Mount Afdera. Mount Alayta covers an area of 2,700 square kilometers southwest of Lake Afrera. A chain of younger craters are aligned along a north-northwest axis in the basaltic-to-trachytic shield along the east side of the shield volcano, which extends to the western flank of Mount Afdera. The Alayta Lavafeld was formed from a series of north-south fissures. In two areas on the southern side of the volcanic complex, fumaroles can be observed.

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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
1907~1908 · 1件 · 最大 VEI 21914~1915 · 1件 · 最大 VEI 219071909191119131914

詳細タイムライン

  1. 1915年VEI 2観測記録
    1915 ~ 進行中
  2. 1907年VEI 2観測記録
    1907-06 ~ 1907-08-04
    SE flank

外部リンク

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