A pyroclastic flow descends the SW flank of Merapi volcano on 14 June 1984. A long period of lava dome growth began on 2 October 1972, and continued intermittently until 1990, occasionally punctuated by partial dome collapse that formed pyroclastic flows (block-and-ash flows) that travel down the flanks.

Photo by Ministry of Public Works, 1984 (courtesy of Volcanological Survey of Indonesia).

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Galleries: Lava Domes | Pyroclastic Flows

Keywords: ash plume | pyroclastic density current (PDC) | block-and-ash flow | dome collapse | lava dome | eruption

Merapi