Sork Ale

Geography & Climate

Sork Ale is located in Ethiopia-Eritrea, within the Afar Rift Volcanic Province of the broader Eastern Africa Volcanic Regions. Situated at 13.18° N, 41.73° E in the Northern Hemisphere, the volcano lies within a tropical climate zone. With a summit elevation of 1,611 meters above sea level, Sork Ale 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

Sork Ale 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 Sork Ale in Ethiopia-Eritrea 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.

GVP Reference Summary

Sork Ale is a silicic stratovolcano located in the Danakil horst SW of Dubbi volcano. Also known as Asdaga, it was constructed perpendicular to the NE-SW orientation of three larger stratovolcanoes (Nabro, Mallahle, and Asavyo) with which it forms the Bidu Volcanic Complex at the southern end of the Danakil Alps. A small, roughly 1-km-wide, 300-m-deep steep-walled caldera is found at the summit. Basaltic lava flows are prominent on the E side of the volcano, and satellite vents are located on the SE flank. The International Association of Volcanology and Chemistry of the Earth's Interior (1973) listed Sork Ale as probably active during the last 2000 years, but Wood (1980, pers. comm.) considered Holocene activity unlikely. The flanks are extensively dissected on the SW to NE sides, but less dissected flows form the eastern-to-southern flanks.

— Smithsonian Institution, Global Volcanism Program