A convecting ash column rises above a small pyroclastic flow on the SW flank of Colima volcano in México on 16 April 1991. The pyroclastic flow, colored by the late-afternoon sun, was produced by the collapse of portions of the summit lava dome.

Photo by Alfredo Ramirez (pilot Ernesto Gómez Hofman), 1991 (courtesy Melchor Urzua, Protección Civil de Colima).

This image is made available under the Creative Commons BY-NC-ND 4.0 license terms.

Galleries: Pyroclastic Flows

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

Colima