Global Volcanism Program | Image GVP-03641
Socorro Island is the summit of a massive, predominantly submarine shield volcano that is capped by a largely buried, 4.5-km-wide summit caldera. Cerro Evermann (center), which forms the 1050-m-high summit of the volcano, is seen here from the south. Mild fumarolic activity continues at the summit lava dome complex. Rhyolitic lava domes have also been constructed along flank rifts, and silicic lava flows have reached the coast. Historical eruptions have been restricted to flank vents, including a submarine vent west of Socorro during 1993-94.
Photo by Steve Nelson, 1989 (Tulane University).