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Aluto

Photo of this volcano
  • Ethiopia
  • Main Ethiopian Rift Zone
  • Composite | Stratovolcano
  • 1550 CE
  • Country
  • Volcanic Province
  • Landform | Volc Type
  • Last Known Eruption
  • 7.77°N
  • 38.78°E

  • 2335 m
    7661 ft

  • 221270
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports available for Aluto.

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

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

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Eruptive History

There is data available for 5 confirmed Holocene eruptive periods.

1550 ± 50 years Confirmed Eruption  

Episode 1 | Eruption Episode Tephra sample from E flank of edifice
1550 ± 50 years - Unknown Evidence from Isotopic: 14C (calibrated)
 Pumiceous pyroclastic deposits were sampled on the E flank of the edifice by Hutchison et al. (2016); charcoal was 14C dated at 0.40 ± 0.05 cal ka (1550 ± 50 CE).

List of 2 Events for Episode 1 at Tephra sample from E flank of edifice

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Tephra
   - - - -    - - - - Pumice

0050 BCE (?) Confirmed Eruption  

Episode 1 | Eruption Episode
0050 BCE (?) - Unknown Evidence from Isotopic: 14C (uncalibrated)
 Obsidian flows and pumice breccias 14C dated at about 2,000 years ago (Gianelli and Teklemariam, 1993).

List of 4 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Lava flow
   - - - -    - - - - Lava flow Obsidian.
   - - - -    - - - - Pumice

6200 BCE ± 1680 years Confirmed Eruption  

Episode 1 | Eruption Episode Tephra sample from Deka Wede (W of caldera)
6200 BCE ± 1680 years - Unknown Evidence from Isotopic: 14C (calibrated)
 Pumice overlying a paleosol was sampled at Deka Wede, W of the caldera; charcoal and melanoides shells were 14C dated at 9.55 ± 0.28 to 6.60 ± 0.13 cal ka (multiple references as reported in Hutchison et al., 2016).

List of 1 Events for Episode 1 at Tephra sample from Deka Wede (W of caldera)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Pumice

7280 BCE ± 2000 years Confirmed Eruption  

Episode 1 | Eruption Episode Tephra sample from Haroresa (S of caldera)
7280 BCE ± 2000 years - Unknown Evidence from Isotopic: 14C (calibrated)
 Pumice bracketed by gravels was sampled at Haroresa, S of the caldera; melanoides shells were 14C dated at 11.12 ± 0.11 to 7.29 ± 0.06 cal ka (Benvenuti et al., 2013, as reported in Hutchison et al., 2016).

List of 1 Events for Episode 1 at Tephra sample from Haroresa (S of caldera)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Pumice

10900 BCE ± 1630 years Confirmed Eruption  

Episode 1 | Eruption Episode Tephra sample from Deka Wede (W of caldera)
10900 BCE ± 1630 years - Unknown Evidence from Isotopic: 14C (calibrated)
 Pumice overlying fluvial sands, above the Abernosa pumice, was sampled at Deka Wede, W of the caldera; charcoal and melanoides shells were 14C dated at 12.26 ± 0.27 to 9.55 ± 0.28 cal ka (multiple references as reported in Hutchison et al., 2016).

List of 1 Events for Episode 1 at Tephra sample from Deka Wede (W of caldera)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Pumice
Deformation History

There is data available for 4 deformation periods. Expand each entry for additional details.


Deformation during 2009 Jan 14 - 2010 Jul 28 [Subsidence; Observed by InSAR]

Start Date: 2009 Jan 14 Stop Date: 2010 Jul 28 Direction: Subsidence Method: InSAR
Magnitude: 4.000 cm Spatial Extent: Unknown Latitude: Unknown Longitude: Unknown

Remarks: Alternating pulses of uplift and subsidence may suggest interaction between the magmatic and hydrothermal systems at Alutu.

Figure (see Caption)

Alutu deflation 2, 14 January 2009 to 28 July 2010. Each fringe represents 2.8 cm of deformation.

From: Biggs et al. 2011.


Reference List: Biggs et al. 2011.

Full References:

Biggs J, Bastow I D, Keir D, Lewi E, 2011. Pulses of deformation reveal frequently recurring shallow magmatic activity beneath the Main Ethiopian Rift. Geochemistry Geophysics Geosystems, 12, Q0AB10. https://doi.org/10.1029/2011GC003662

Deformation during 2008 May 14 - 2008 Dec 01 [Uplift; Observed by InSAR]

Start Date: 2008 May 14 Stop Date: 2008 Dec 01 Direction: Uplift Method: InSAR
Magnitude: 10.000 cm Spatial Extent: Unknown Latitude: Unknown Longitude: Unknown

Remarks: Alternating pulses of uplift and subsidence may suggest interaction between the magmatic and hydrothermal systems at Alutu.

Figure (see Caption)

Alutu inflation 2, 14 May 2008 to 1 December 2008. Each fringe represents 2.8 cm of deformation.

From: Biggs et al. 2011.


Reference List: Biggs et al. 2011.

Full References:

Biggs J, Bastow I D, Keir D, Lewi E, 2011. Pulses of deformation reveal frequently recurring shallow magmatic activity beneath the Main Ethiopian Rift. Geochemistry Geophysics Geosystems, 12, Q0AB10. https://doi.org/10.1029/2011GC003662

Deformation during 2004 Sep 22 - 2008 Mar 05 [Subsidence; Observed by InSAR]

Start Date: 2004 Sep 22 Stop Date: 2008 Mar 05 Direction: Subsidence Method: InSAR
Magnitude: 5.000 cm Spatial Extent: Unknown Latitude: Unknown Longitude: Unknown

Remarks: Alternating pulses of uplift and subsidence may suggest interaction between the magmatic and hydrothermal systems at Alutu.

Figure (see Caption)

Alutu deflation 1, 22 September 2004 to 5 March 2008. Each fringe represents 2.8 cm of deformation.

From: Biggs et al. 2011.


Reference List: Biggs et al. 2011.

Full References:

Biggs J, Bastow I D, Keir D, Lewi E, 2011. Pulses of deformation reveal frequently recurring shallow magmatic activity beneath the Main Ethiopian Rift. Geochemistry Geophysics Geosystems, 12, Q0AB10. https://doi.org/10.1029/2011GC003662

Deformation during 2003 Dec 17 - 2004 Sep 18 [Uplift; Observed by InSAR]

Start Date: 2003 Dec 17 Stop Date: 2004 Sep 18 Direction: Uplift Method: InSAR
Magnitude: 15.000 cm Spatial Extent: Unknown Latitude: Unknown Longitude: Unknown

Remarks: Alternating pulses of uplift and subsidence may suggest interaction between the magmatic and hydrothermal systems at Alutu.

Figure (see Caption)

Alutu inflation 1, 17 December 2003 to 18 August 2004. Each fringe represents 2.8 cm of deformation.

From: Biggs et al. 2011.


Reference List: Biggs et al. 2011.

Full References:

Biggs J, Bastow I D, Keir D, Lewi E, 2011. Pulses of deformation reveal frequently recurring shallow magmatic activity beneath the Main Ethiopian Rift. Geochemistry Geophysics Geosystems, 12, Q0AB10. https://doi.org/10.1029/2011GC003662

Emission History

There is no Emissions History data available for Aluto.

GVP Map Holdings

Maps are not currently available due to technical issues.

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included.

Smithsonian Sample Collections Database

The following 1 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections, and may be availble for research (contact the Rock and Ore Collections Manager). Catalog number links will open a window with more information.

Catalog Number Sample Description Lava Source Collection Date
NMNH 111525 Welded-Pantelleritic Tuff -- --
External Sites