Global Volcanism Program | Image GVP-09427
Entry of the Delta Lávico flow into the sea produces steam clouds along the margins of the flow. The flow originated from a vent low on the Volcán Bárcena 1952-53 tuff cone visible behind the flow. Punta Sur, the southernmost tip of the island, is in the left background and consists of a truncated portion of the trachytic Montículo Cinerítico tuff cone, which formed prior to the 1952 eruption and was formerly the highest point on the island.
Photo by U.S. Navy, 1952 (courtesy of Sherman Neuschel, U.S. Geological Survey).