Global Volcanism Program | Image GVP-09638
A steam plume pours from fumaroles on the pyroclastic cone on the south side of the summit crater lake of Poás volcano in this February 2000 view from the NW. Vigorous degassing produced plumes up to about 700 m high in May, and bubbling of the crater lake had been reported since late March. A temperature of 40°C was measured on the NE shore of the lake at various points in May. The 400-m-wide coldwater lagoon known as Laguna del Fría or Laguna del Poás is visible at the upper left within Botos maar.
Photo by Federico Chavarria Kopper, 2000.