Alutu

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 7.77°N
  • 38.78°E

  • 2335 m
    7659 ft

  • 221270
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Alutu.

The Global Volcanism Program has no Weekly Reports available for Alutu.

The Global Volcanism Program has no Bulletin Reports available for Alutu.

Alutu, between lakes Zway and Mirrga (Langano), 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 from Alutu produced the Hulo-Seyno Ignimbrite about 155,000 years ago. The latest eruptions produced obsidian flows and pumice breccias about 2000 years ago. Alutu eruptive products overlie recent basaltic lava flows to the west. Strong fumarolic activity continues, and the volcano has been the object of a geothermal exploration program.

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
0050 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected)

The Global Volcanism Program has no synonyms or subfeatures listed for Alutu.

Alutu volcano lies between light-brown Lake Mirrga (Lake Langano) on the south and greenish Lake Zway on the north. The volcano displays several craters aligned along NNE-SSW and E-W fissures. Dark-colored obsidian lava flows erupted from craters along the fissures have descended the flanks in all directions. Although the age of the most recent eruption of Alutu is not known, its eruptive products overlie recent basaltic lava flows to the west, and strong fumarolic activity continues.

NASA Space Shuttle image ISS001-363-7, 2001 (http://eol.jsc.nasa.gov/).
A large area of Holocene-to-prehistorical cinder cones and lava flows lies immediately east and south of Zway Lake (bottom) and forms islands along its eastern shore in this NASA Landsat mosaic (with north to the top). Faulting along the East Zway segment of the Wonji Fault Belt is seen cutting horizontally across the bottom of the image. The dark-colored Alutu volcanic complex lies the lower left. The 15 x 30 km wide Zway (also spelled Zwai, Zeway, or Ziway) lake occupies the central Ethiopian Rift.

NASA Landsat7 image (worldwind.arc.nasa.gov)

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Di Paola G M, 1972. The Ethiopian Rift Valley (between 7° 00' and 8° 40' lat north). Bull Volc, 36: 517-560.

Gianelli G, Teklemariam M, 1993. Water-rock interaction process in the Aluto-Langano geothermal field (Ethiopia). J Volc Geotherm Res, 56: 429-445.

Katsui Y (ed), 1971. List of the World Active Volcanoes. Volc Soc Japan draft ms, (limited circulation), 160 p.

Mohr P A, Mitchell J G, Raynolds R G H, 1980. Quaternary volcanism and faulting at O'a caldera, central Ethiopian Rift. Bull Volc, 43: 173-190.

WoldeGabriel G, 1987. . (pers. comm.).

Volcano Types

Stratovolcano
Lava dome(s)
Cinder cone(s)

Tectonic Setting

Rift zone
Continental crust (> 25 km)

Rock Types

Major
Rhyolite
Dacite
Basalt / Picro-Basalt

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
6,011
25,619
314,216
6,813,710

Affiliated Databases

Large Eruptions of Alutu Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.