Mount Dempo is the highest stratovolcano in South Sumatra province that rises above Pasumah Plain near Pagar Alam and adjacent with Bengkulu Province. Seven craters are found around the summit. A 400 m wide lake is found at the north-west end of the crater complex.
The most recent activity has been in 2009. Historical activity has been confined to being small-to-moderate explosive activity that produced ashfall near the volcano.