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Tongkoko volcano, Indonesia
The 1149-m-high elongated Tongkoko volcano, seen in this composite photo from the south, rises above Bitung city and is the NE-most volcano on the island of Sulawesi.
The summit of the volcano, which is elongated in a NW-SE direction, contains a large crater with a central cone.
Historical eruptions have occurred since 1680 from both the summit and an east flank vent, Batu Angus.
Tongkoko volcano and its neighbor Dua Saudara are the most prominent features of Gunung Dua Saudara National Park, a noted wildlife preserve.
The NE-most volcano on the island of Sulawesi, Tongkoko (also known as Tangkoko) has a summit that is elongated in a NW-SE direction with a large deep crater that in 1801 contained a cone surrounded by lake water.
The slightly higher Dua Saudara stratovolcano is located only 3 km to the SW of Tongkoko, and along with Tongkoko, forms the most prominent features of Gunung Dua Saudara National Park, a noted wildlife preserve.
Eruptions occurred from the summit crater of Tongkoko in the 17th century and in 1801.
The prominent, flat-topped lava dome Batu Angus formed on the east flank of Tongkoko in 1801, and, along with an adjacent east flank vent, has been the source of all subsequent eruptions.
PHOTO SOURCE: Photo by A.R. Sumailani, 1973 (Volcanological Survey of Indonesia). courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.
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