Smithsonian Global Volcanism ProgramVNUM 221090

Ale Bagu

Afar Rift Volcanic Province, Ethiopia. This page separates the permanent volcano catalogue, historical eruption records, and selective weekly activity reports.

Coordinates: 13.51° N, 40.63° E
Elevation: 988 m
Last recorded eruption: Not supplied
Historical eruption records: 0
Primary type: Stratovolcano
Evidence: Evidence Credible
GVP database: 5.4.0
Catalogue revision: Revision 2

Volcano profile

Volcanic landform: Composite
Tectonic setting: Rift zone / Intermediate crust (15-25 km)
Geologic epoch: Holocene
Major rock type: Basalt / Picro-Basalt
Region: Eastern Africa Volcanic Regions
Subregion: Afar Rift Volcanic Province

Geological summary

Ale Bagu, also known as Ummuna, is an elongated stratovolcano located SW of Erta Ale volcano. In contrast to other volcanoes of the Erta Ale Range, it is located SW of the axis of the range, and is mantled by basaltic pyroclastic rocks. Summit craters are elongated along a NNW-SSE trend. The main crater is a steep-walled, 750 x 450 m depression occupied by a steep-sided lava cone that has fed trachytic lava flows over the crater floor. Silicic lavas from the axial regional fissure extend to the NW and SE.

Separate activity dataset

Weekly volcanic activity reports

Preliminary and selective

Smithsonian/USGS weekly reports are selective and preliminary. They are not a comprehensive list of all eruptions or volcanic activity.

No weekly report appears on this page. Absence from the weekly report does not establish an absence of volcanic activity.

Historical catalogue records

Eruption history

Dates can be approximate, incomplete, or BCE. These are historical catalogue observations, not a statement about present activity.

No historical eruption records appear on this page.

Source and attribution

Source: Data: Smithsonian Institution Global Volcanism Program, Volcanoes of the World.

View the original Smithsonian GVP record

Global Volcanism Program, 2026. Volcanoes of the World 5.4.0.

The GVP database is scientific documentation that changes as evidence is reviewed. Historical dates may be approximate or uncertain. This platform is not an official emergency-warning service.

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Data freshness

Source updated: Not supplied
Retrieved: 11 Oct 2026, 13:07 UTC
GVP database version: 5.4.0
Catalogue revision: 2

Source-update and retrieval times describe this catalogue record. Each weekly report carries its own publication date and preliminary status.