Global Volcanism Program | Image GVP-00783
Sulfur miners (left) extract sulfur from the crater walls of Kawah Ijen. Large baskets of sulfur are carried up to the crater rim and down its flanks. The sulfur factory is located at Jambu, on the SE flank above Banyuwangi.
Photo by Tom Casadevall, 1987 (U.S. Geological Survey).