Superimposed before and after photographs showing collapse of a lav...

Overlain photographs from a time-lapse camera show the East Lae‘apuki lava delta before and after part of the delta collapsed on August 27, 2005. The collapse occurred piecemeal during a 90-minute period. Loose rocks on the remaining delta were deposited there by large waves generated during the initial collapse. Such collapses add material to the submarine slope on which future deltas are built. White plumes mark location of lava entering the sea.