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Adwa

成層火山 · Ethiopia · 1670m

A caldera 4 x 5 km wide cuts the summit of Adwa volcano above the center of this NASA Landsat image with N to the top. This prominent volcano (also known as Aabida, Amoissa, or Dabita) is in the southern Afar area immediately E of Ayelu volcano, which lies above and to the left of the westernmost flank lava flow. These prominent young basaltic lava flows were erupted from vents on the W, E, and S flanks of Adwa volcano and overlap a sedimentary plain to the SE.
A caldera 4 x 5 km wide cuts the summit of Adwa volcano above the center of this NASA Landsat image with N to the top. This prominent volcano (also known as Aabida, Amoissa, or Dabita) is in the southern Afar area immediately E of Ayelu volcano, which lies above and to the left of the westernmost flank lava flow. These prominent young basaltic lava flows were erupted from vents on the W, E, and S flanks of Adwa volcano and overlap a sedimentary plain to the SE. · 写真: NASA Landsat 7 image (worldwind.arc.nasa.gov) · Wikimedia Commons
タイプ
成層火山
国
Ethiopia
地域
Eastern Africa Volcanic Regions / Main Ethiopian Rift Volcanic Province
標高
1670m
座標
10.063, 40.831
最終噴火
不明
テクトニクス環境
Rift zone / Intermediate crust (15-25 km)
火山地形
Composite
主要岩石
Rhyolite
地質学的概要

Adwa (also known as Aabida, Amoissa, or Dabita), is a broad stratovolcano in the southern Afar area immediately east of the younger vegetated Ayelu volcano. It has a roughly 3 x 4 km caldera that originated following eruption of voluminous ignimbrites, with a trachytic dome extruded in the eastern part of the caldera. Scoria cones are located on the floor of the caldera and on its NW and SW flanks. Extensive young basaltic lava flows cover the flanks and overlap a sedimentary plain to the SE. Many fumaroles occur within the caldera. Satellitic pyroclastic cones and lava domes were considered to be only a few hundred years old (Mohr 1980, pers. comm.). Dark lava flows originating from cones about 4 km from the caldera rim on the SW flank cover more than 50 km2.

Wikipedia の要約

英語版の要約

Adwa is a stratovolcano in Ethiopia, located in the western Afar Region region and has a 4 by 5 km caldera. Due to the location of the volcano near the boundary between Afar and Issa tribes, little is known about the past and present behavior of the volcano. However, an earthquake and InSAR study conducted by Derek Keir and colleagues shows that a magma intrusion around 5 km deep and 8 km long emanated away from the eastern side of the volcano in May 2000.

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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
1828~1838 · 1件 · 最大 VEI 21918~1928 · 1件 · 最大 VEI 218281848187818981918

詳細タイムライン

  1. 1928年VEI 2地質学的推定
    1928 ~ 進行中
  2. 1828年VEI 2地質学的推定
    1828 ~ 進行中

外部リンク

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