No latest activity reported for Sibayak.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Cameron N R, Aspden J A, Bridge D M, Djunuddin A, Ghazali S A, Harahap H, Hariwidjaja S, Johari, Kartawa W, Keats W, Ngabito H, Rock N M S, Whandoyo R, 1982. Geologic map of the Medan quadrangle, Sumatra. {Geol Res Devel Centre Indonesia}, 1:250,000 map and 26 p text

Neumann van Padang M, 1951. Indonesia. {Catalog of Active Volcanoes of the World and Solfatara Fields}, Rome: IAVCEI, 1: 1-271

Neumann van Padang M, 1983. History of volcanology in the former Netherlands East Indies. {Scripta Geol}, 71: 1-76

Sibayak and Pinto are twin volcanoes within a compound caldera open to the north. The 900-m-wide crater of Sibayak is partially filled on the north by Pinto volcano. A lava flow traveled through a gap in the western crater wall from the summit lava dome of Sibayak. Area residents record legends of eruptions. Neumann van Padang (1983) cited a report by Hoekstra of ash clouds that were emitted from the volcano in 1881.