Aniakchak is a 10-km-wide summit caldera containing numerous cones, lava domes, and lava flows on the caldera floor. The largest intra-caldera cone is Vent Mountain that reaches 430 m in height and has a diameter at the base of 2.5 km. At least 20 Holocene eruptions may have occurred before the Aniakchak II caldera-forming eruption.

Photo by M. Woodbridge Williams (National Park Service).

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Galleries: Craters

Keywords: caldera | crater

Aniakchak