Mount Sempu is a volcano in the northern arm of Sulawesi, Indonesia, which contains a 3 km wide caldera. A maar, called Kawah Masem, was formed in the south-west of the caldera and contains a crater lake. Sulfur deposits have been extracted from the maar since 1938. Historical records, however, are unknown from the volcano.
See also
Bunaken National Park Lake Tondano List of volcanoes in Indonesia Manado river Mount Klabat Mount Soputan Tangkoko Batuangus Nature Reserve
References