Global Volcanism Program | Image GVP-03100
An aerial view of the summit of South Sister from the south, seen here in 1981, shows a snow-filled summit crater that seasonally contains a small melt-water lake. Fissure eruptions occurred during the Holocene from flank vents including some near Carver Lakes on the NE flank, seen here to the upper right.
Photo by Willie Scott, 1981 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.