Global Volcanism Program | Image GVP-05594

The degassing Poás crater, seen here in an aerial view from the NE, lies within the smaller of two nested calderas at the summit. This inner caldera is 4 km in diameter. A tourist overlook along the ESE crater rim near the upper left provides a view into the crater. Photo by National Aeronautics and Space Administration (NASA), 1982.

The degassing Poás crater, seen here in an aerial view from the NE, lies within the smaller of two nested calderas at the summit. This inner caldera is 4 km in diameter. A tourist overlook along the ESE crater rim near the upper left provides a view into the crater.

Photo by National Aeronautics and Space Administration (NASA), 1982.

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Keywords: crater | plume | emissions | degassing | erosion

Poás