Dabbahu

Geography & Climate

Dabbahu is located in Ethiopia, within the Afar Rift Volcanic Province of the broader Eastern Africa Volcanic Regions. Situated at 12.60° N, 40.48° E in the Northern Hemisphere, the volcano lies within a tropical climate zone. With a summit elevation of 1,401 meters above sea level, Dabbahu is a moderately sized peak that remains accessible to hikers and researchers for much of the year. The volcanic landform is characterized as a composite, which describes the physical shape and structure of the volcanic edifice as observed from the surface.

Geological Context

Dabbahu is situated along a rift zone, where tectonic plates are pulling apart. As the crust thins and fractures, magma rises to fill the gap, creating volcanic activity. Rift volcanism typically produces more fluid lava flows rather than explosive blasts, which means communities near Dabbahu in Ethiopia generally face slower-moving hazards like lava flows and ground fissures rather than sudden pyroclastic events. However, rift volcanoes can still generate significant ash emissions and gas releases that affect local air quality. The dominant rock type is basalt / picro-basalt, a dark, fine-grained volcanic rock that forms from rapidly cooling, low-viscosity lava. Basaltic eruptions tend to be less explosive and produce fluid lava flows that can travel long distances. While less immediately dangerous than explosive eruptions, basaltic lava flows can destroy structures and infrastructure in their path, and volcanic gases released during these eruptions can affect air quality over a wide area.

Eruption History Summary

Dabbahu has 4 recorded eruptions in the geological database, spanning from 5850 BCE to 2005 CE. The most powerful recorded event was a severe eruption capable of regional ash fall and pyroclastic flows in 2005 CE, reaching VEI 3 on the Volcanic Explosivity Index. These eruptions span roughly 7,855 years of volcanic history. With eruptive activity as recently as 2005 CE, Dabbahu remains an actively monitored volcano.

Significance

With a maximum recorded VEI of 3, Dabbahu has produced eruptions capable of generating pyroclastic flows and significant ash fall in the surrounding area. While not among the largest eruptions globally, VEI 3 events pose serious hazards to local populations and can disrupt regional air travel. Given its recent activity, Dabbahu is closely monitored by geological survey organizations to provide early warning of future unrest.

GVP Reference Summary

Dabbahu (also known as Boina, Boyna, or Moina) is a Pleistocene-to-Holocene volcanic massif forming an axial range of the Afar depression SSW of the Alayta massif. Late-stage pantelleritic obsidian flows, lava domes, and pumice cones form the summit and upper flanks. The volcano rises above the Teru Plain and was built over a volumetrically dominant base of basaltic-to-trachyandesitic lava flows of a shield volcano. Late-stage basaltic fissure eruptions also occurred at the NW base of the volcano. Abundant fumaroles are located along the crest of the volcano and extend NE towards Alayta. The first historical eruption took place from a fissure vent on the NE flank in September 2005, producing ashfall deposits and a small pumice dome. More than 6000 people were evacuated from neighboring villages.

— Smithsonian Institution, Global Volcanism Program