The ice-filled crater of Petrel maar is here seen from the southwest; this approximately 300-m-wide crater formed in a phreatomagmatic eruption about 1905 CE. Petrel maar and Deacon Peak are the two main vents identified on Penguin Island, and represent the youngest activity.

Photo by Oscar González-Ferrán (University of Chile).

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

Keywords: crater | maar | crater lake

Penguin Island