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Global Volcanism Program | Image GVP-00694

Merapi volcano, one of Indonesia's most active, rises above the city of Yogyakarta in central Java. This May 1987 view from the southern flank with the red-roofed Plawangan observatory on the forested ridge in the foreground shows Merapi's degassing summit lava dome. Unvegetated areas on the left result from periodic rockfalls, avalanches, and pyroclastic flows (block-and-ash flows) from the growing lava dome. Photo by Tom Casadevall, 1986 (U.S. Geological Survey).

Merapi volcano, one of Indonesia's most active, rises above the city of Yogyakarta in central Java. This May 1987 view from the southern flank with the red-roofed Plawangan observatory on the forested ridge in the foreground shows Merapi's degassing summit lava dome. Unvegetated areas on the left result from periodic rockfalls, avalanches, and pyroclastic flows (block-and-ash flows) from the growing lava dome.

Photo by Tom Casadevall, 1986 (U.S. Geological Survey).

Keywords: gas plume | gas | emissions | stratovolcano


Merapi