Global Volcanism Program | Image GVP-11054
The small circular feature just above the center of this NASA International Space Station image (with north to the upper left) is Chaitén caldera. It is located 10 km NE of the town of Chaitén, the light-colored area along on the Gulf of Corcovado below and to the right of the caldera. This small, glacier-free, 3.5-km-wide caldera is of Pleistocene age, but has a rhyolitic Holocene lava dome.
NASA International Space Station image ISS006-E-42131, 2003 (http://eol.jsc.nasa.gov/).
This image is made available as a Public Domain Work, but proper attribution is appreciated.