Akutan has a 2-km-wide summit caldera with a large scoria cone that rises above the caldera rim. It is seen here from the south in eruption on 11 February 1987. A small lake occupies part of the caldera floor. The caldera rim is breached narrowly on the north side through which a 1978 lava flow traveled to within 2 km of the sea.

Photo by Jerry Chisum (Mark Airways), 1987 (courtesy of John Reeder, Alaska Div. Geology & Geophysical Surveys).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Galleries: Ash Plumes and Ashfall | Calderas

Keywords: ash plume | ash | plume | tephra | eruption | scoria cone | crater | caldera | ashfall

Akutan