Global Volcanism Program | Image GVP-07611
Izalco volcano was once known as the "Lighthouse of the Pacific" for its persistent incandescent nighttime eruptions. It was constructed on the southern flank of Santa Ana, whose broad summit is to the left. To the right is Cerro Verde, a scoria cone on the SE Santa Ana flank. Lava flows at the base if Izalco from both summit and flank vents and extend out to 7 km.
Photo by Lee Siebert, 1999 (Smithsonian Institution).