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Alutu

Aluto

成層火山 · Ethiopia · 2335m

Alutu volcano lies between the light-brown Lake Mirrga (Lake Langano) to the S and green-blue Lake Zway to the N. Several craters are aligned along NNE-SSW and E-W fissures. Dark-colored obsidian lava flows erupted from craters along the fissures and descended the flanks in all directions. Although the age of the most recent eruption is not known, its eruptive products overlie recent basaltic lava flows to the W and strong fumarolic activity continues.
Alutu volcano lies between the light-brown Lake Mirrga (Lake Langano) to the S and green-blue Lake Zway to the N. Several craters are aligned along NNE-SSW and E-W fissures. Dark-colored obsidian lava flows erupted from craters along the fissures and descended the flanks in all directions. Although the age of the most recent eruption is not known, its eruptive products overlie recent basaltic lava flows to the W and strong fumarolic activity continues. · 写真: NASA International Space Station image ISS001-363-7, 2001 (http://eol.jsc.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
2335m
座標
7.770, 38.780
最終噴火
1550年
テクトニクス環境
Rift zone / Continental crust (> 25 km)
火山地形
Composite
主要岩石
Rhyolite
地質学的概要

Aluto, between lakes Zway and Langano (Mirrga), is a stratovolcano with multiple vents aligned along NNE-SSW and E-W fissures along a narrow graben between the two lakes. This silicic volcanic center lies along the regional Wonji Fault Belt and has produced abundant pumice-flow and pumice-fall deposits, along with lesser rhyolitic lava flows. Obsidian lava flows erupted from craters along the fissures have descended the flanks in all directions. Cinder cones, lava domes, phreatic explosion craters, and thermal springs are structurally controlled. The oldest known eruptions produced the Hulo-Seyno Ignimbrite about 155,000 years ago. The latest eruptions produced obsidian flows and pumice breccias about 2,000 years ago. Eruptive products overlie recent basaltic lava flows to the west. Strong fumarolic activity continues.

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
10900 BCE~10485 BCE · 1件 · 最大 VEI ?7580 BCE~7165 BCE · 1件 · 最大 VEI ?6335 BCE~5920 BCE · 1件 · 最大 VEI ?110 BCE~305 · 1件 · 最大 VEI ?1135~1550 · 1件 · 最大 VEI ?10900 BCE7995 BCE4675 BCE1770 BCE1135

詳細タイムライン

  1. 1550年 (±50年)VEI ?地質学的推定
    1550 ~ 進行中
    Tephra sample from E flank of edifice
  2. 紀元前 50年VEI ?地質学的推定
    BCE 50 ~ 進行中
  3. 紀元前 6200年 (±1680年)VEI ?地質学的推定
    BCE 6200 ~ 進行中
    Tephra sample from Deka Wede (W of caldera)
  4. 紀元前 7280年 (±2000年)VEI ?地質学的推定
    BCE 7280 ~ 進行中
    Tephra sample from Haroresa (S of caldera)
  5. 紀元前 10900年 (±1630年)VEI ?地質学的推定
    BCE 10900 ~ 進行中
    Tephra sample from Deka Wede (W of 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。