The western flanks of Cerro Chato on the SE side of Arenal are seen here from the OVSICORI-UNA/Smithsonian Institution volcano observatory at Arenal in 1998. At this time, the last known eruption was about 3,500 years ago. Following that eruption, it contained a 500-m-wide summit crater that is partially filled by Laguna Cerro Chato.

Photo by Jorge Barquero, 1998 (OVSICORI-UNA).

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

Arenal