Global Volcanism Program | Image GVP-07636
Usulután is part of a cluster of volcanoes north of the Pacific coastal plain between San Vicente and San Miguel, seen here from the SSW. Cerro Oromontique, the small peak to the left, formed on the flank of El Tigre. Relatively young lava flows are on the southern flank.
Photo by Lee Siebert, 1999 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.