Global Volcanism Program | Image GVP-05801
Cerro Azul volcano at the SW tip of J-shaped Isabela Island rises in the distance above the rim of Fernandina caldera. The flat-topped shield volcano is truncated by a deep, steep-walled 4 x 5 km summit caldera. A prominent cinder cone is located at the ENE side of the caldera and youthful lava flows cover its floor. Numerous spatter cones dot the western flanks. Fresh-looking lava flows, many erupted from circumferential fissures, descend the NE and NW flanks. Historical eruptions date back only to 1932.
Photo by Lee Siebert, 1978 (Smithsonian Institution).