Global Volcanism Program | Image GVP-06169
A series of craters oriented along a NE-SW line caps the summit of Erebus volcano. The 500 x 600 m wide Main Crater (left) contains an active lava lake inside a steep-walled Inner Crater, which forms the dark area at the NE (lower left) side of Main Crater. A smaller inactive crater (center), referred to as Side Crater, is located immediately SW of Main Crater. The smaller West Crater appears at the upper right, farther down the flank of the summit cone.
Photo by Bill Rose, 1983 (Michigan Technological University).