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Alutu

Aluto

Estratovolcán · Ethiopia · 2335 m

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. · Foto: NASA International Space Station image ISS001-363-7, 2001 (http://eol.jsc.nasa.gov/). · Wikimedia Commons
Tipo
Estratovolcán
País
Ethiopia
Región
Eastern Africa Volcanic Regions / Main Ethiopian Rift Volcanic Province
Altitud
2335 m
Coordenadas
7.770, 38.780
Última erupción
1550
Contexto tectónico
Rift zone / Continental crust (> 25 km)
Forma volcánica
Composite
Roca principal
Rhyolite
Resumen geológico

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.

Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
10900 BCE~10485 BCE · 1 erupciones · VEI máx. ?7580 BCE~7165 BCE · 1 erupciones · VEI máx. ?6335 BCE~5920 BCE · 1 erupciones · VEI máx. ?110 BCE~305 · 1 erupciones · VEI máx. ?1135~1550 · 1 erupciones · VEI máx. ?10900 BCE7995 BCE4675 BCE1770 BCE1135

Línea de tiempo detallada

  1. 1550 (±50 años)VEI ?Estimación geológica
    1550 – En curso
    Tephra sample from E flank of edifice
  2. 50 a. C.VEI ?Estimación geológica
    BCE 50 – En curso
  3. 6200 a. C. (±1680 años)VEI ?Estimación geológica
    BCE 6200 – En curso
    Tephra sample from Deka Wede (W of caldera)
  4. 7280 a. C. (±2000 años)VEI ?Estimación geológica
    BCE 7280 – En curso
    Tephra sample from Haroresa (S of caldera)
  5. 10900 a. C. (±1630 años)VEI ?Estimación geológica
    BCE 10900 – En curso
    Tephra sample from Deka Wede (W of caldera)

Enlaces externos

⚠ Solo como referencia. No apto para respuesta ante emergencias.