Global Volcanism Program | Image GVP-01245
The summit of 862-m-high Gunung Sirung volcano on Pantar Island is truncated by a 2-km wide caldera whose floor often contains one or more small lakes. A number of small phreatic eruptions have taken place in the 20th century from vents inside the caldera.
Photo by L.D. Reksowirogo, 1972 (Volcanological Survey of Indonesia).