The steep, hydrothermally altered scarp on the left is the headwall of the 1772 collapse of Papandayan, which produced a debris avalanche that traveled at high velocities up to 11 km from the volcano, destroying 40 villages and causing nearly 3,000 fatalities.

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

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

Galleries: Volcanic Outcrops

Keywords: hydrothermal alteration | outcrop

Papandayan