Global Volcanism Program | Image GVP-00523
A plume rises from a thermal area near the summit of Sibayak volcano within Singkut caldera. Sibayak is seen here from a village in the flat-floored caldera S of the summit.
Photo by Tom Casadevall, 1987 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.
Singkut