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Global Volcanism Program | Image GVP-09633

A vertical view into the crater lake of Poás volcano in December 1999 shows a steam plume (bottom center) originating from the pyroclastic cone on the south side of the lake.  December plume heights ranged between 0.7 and 1 km.  The 800-m-wide crater contains an acidic lake of variable dimensions.  The steaming pyroclastic cone was formed during eruptive activity from 1953 to 1955.    Photo by Federico Chavarria Kopper, 2000.

A vertical view into the crater lake of Poás volcano in December 1999 shows a steam plume (bottom center) originating from the pyroclastic cone on the south side of the lake. December plume heights ranged between 0.7 and 1 km. The 800-m-wide crater contains an acidic lake of variable dimensions. The steaming pyroclastic cone was formed during eruptive activity from 1953 to 1955.

Photo by Federico Chavarria Kopper, 2000.


Poás