Global Volcanism Program | Image GVP-02366
An acidic lake occupies Troitsky crater, the youngest and southernmost crater of Maly Semyachik where historical eruptions have occurred. The conical peak in the distance is Karymsky, 15 km SW, which was constructed within a Holocene caldera.
Photo by Dan Miller, 1990 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.