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Global Volcanism Program | Image GVP-04544

Akutan summit contains a 2-km-wide caldera that 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. A lava flow in 1978 traveled through this gap to within 2 km of the sea. Photo by Jerry Chisum (Mark Airways), 1987 (courtesy of John Reeder, Alaska Div. Geology & Geophysical Surveys).

Akutan summit contains a 2-km-wide caldera that 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. A lava flow in 1978 traveled through this gap to within 2 km of the sea.

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

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


Akutan