Global Volcanism Program | Image GVP-12791
The roughly 800-m-wide San Miguel crater is seen here in 2011 with fumaroles in the geothermal area on the far crater wall producing small gas-and-steam plumes. Different colors in the crater walls are from various levels of oxidation and geothermal alteration of the rock.
Photo by Lis Gallant, 2011.
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.