(Tangkoko, Batoe Angoes)
1.52 N, 125.20 E
summit elevation 1149 m
Tongkoko volcano is located in NE Sulawesi, 8 km north of the city of Bitung. The city has a population of over 100,000 people. The volcano is located in Tangkoko-Batuangas Dua Saudara National Park. The national park in home to Tarsiers, a small primate with large eyes. Tarsiers are nocturnal.
Tongkoko's crater has a size 2 km x 1 km and a depth of 200 m. Batu Angus Baru is a 3 km diameter olivine-bearing dacite dome which occupies the southeast flank of the volcano. An 1801 basaltic andesite dome occupies part of the caldera floor. A record of the 1880 eruption have been found in ice cores from East Antarctica.
There were an increase in earthquakes at the volcano in 2002. This led to an increase in Alert Level from 1 to 2. The increased number of shallow volcanic earthquakes indicated that seismicity was migrating to the surface.
1880, 1843-46, 1821, 1801, 1694, 1683, 1680.