Prior to an eruption in 1971, the summit crater of Soufrière volcano was filled with a crater lake with a maximum depth of 180 m. Its floor was 560 m below the north crater rim. In 1971 a lava dome slowly and almost aseismically began growing on the crater floor. It first breached the surface on November 3 and eventually formed a large island that left only a narrow moat of lake water.

Photo by Jack Frost.

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Soufrière St. Vincent