Global Volcanism Program | Image GVP-04677
A fissure eruption on the SE caldera bench of Fernandina volcano feeds lava flows that form a spectacular, 530-m-high cascade of molten lava down the caldera wall. A four-day-long eruption began on March 23, 1977 from fissures on the west side of the SE caldera bench, 300 m below the caldera rim. Lava flows can be seen spreading out over the caldera bench before pouring over the caldera wall. The distal end of the lava flows formed a small lava delta in the 2-km-wide caldera lake.
Photo by Dagmar Werner, Charles Darwin Research Station, 1977 (courtesy of Tom Simkin, Smithsonian Institution).