A blocky lava dome, 130 m high and more than 840 m wide filled much of the crater floor of Soufrière St. Vincent volcano during the 1979 eruption. Dome growth began in May, after a series of powerful explosive eruptions April 13-15, and continued until October. Steam continues to rise from the dome in this 1983 photo from the SW crater rim.
This December 1971 photo shows a lava dome rising above the surface of a crater lake on Soufriere St. Vincent volcano in the West Indies. The lake temperature rose to 80 degrees Centigrade during extrusion of the dome, but despite the extrusion of new magma in the crater no explosive eruptions occurred during the eruption.