description Emi Koussi Overview
Emi Koussi is a prominent shield volcano located in the Tibesti Mountains of northern Chad. Rising to an elevation of 3,415 meters, it holds the distinction of being the highest peak in both Chad and the entire Sahara Desert. The summit of the volcano features two distinct calderas and several lava domes, attracting scientific study regarding its geological formation and isolated alpine ecosystem.
help Emi Koussi FAQ
How high is Emi Koussi, and where is it?
Emi Koussi is a shield volcano in the Tibesti Mountains of northern Chad. Its summit reaches 3,415 meters, making it the highest point in both Chad and the Sahara. [NASA](https://science.nasa.gov/earth/earth-observatory/emi-koussi-volcano-chad-49230/)
What is special about Emi Koussi's calderas?
The volcano has a large nested caldera system: NASA describes two older overlapping calderas forming a depression about 12 by 15 km, plus the younger Era Kohor caldera. Era Kohor is associated with eruptive activity within roughly the past 2 million years. [NASA](https://science.nasa.gov/earth/earth-observatory/emi-koussi-volcano-chad-49230/)
Is Emi Koussi an active volcano?
No historical eruption is recorded at Emi Koussi, and the Smithsonian Global Volcanism Program lists the last known eruption as unknown. NASA nevertheless notes an active thermal area on the southern flank, so no recorded recent eruption is safer than calling it completely inactive. [Smithsonian Global Volcanism Program](https://volcano.si.edu/volcano.cfm?vn=225021)
How large is the Emi Koussi volcano?
The broad volcanic structure covers roughly 60 by 80 kilometers, far wider than the summit peak suggests. NASA says it formed from low-viscosity lava flows and explosive ignimbrites in the Tibesti Range. [NASA](https://science.nasa.gov/earth/earth-observatory/emi-koussi-volcano-chad-49230/)
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