The dark lava flow at the lower right, seen here in June 1970, originated from Crater A on the lower western flank of Arenal in September 1968. Gas plumes rise from the B and C craters at the summit.

Photo by William Melson, 1970 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Keywords: lava flow | gas | gas plume | emissions | aa

Arenal