Sumatra, Indonesia
1.556 N, 99.255 E
summit elevation 1819 m
Stratovolcano
Sibualbuali is an eroded volcano with two solfatara fields on the eastern side.
The volcano is located in the Sarulla graben, a composite Plio-Pleistocene basin developed along the northwest striking Sumatra fault.
Possible eruptions in the past 10,000 years.