Tongkoko Volcano | John Seach


(Tangkoko, Batoe Angoes)
Sulawesi, Indonesia

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.

2002-03 Earthquakes
There were an increase in earthquakes at Tongkoko volcano in between October 2002 and January 2003. 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.

Further reading
Tatsumi, Yoshiyuki, et al. "Geochemistry of Quaternary lavas from NE Sulawesi: transfer of subduction components into the mantle wedge." Contributions to Mineralogy and Petrology 107.2 (1991): 137-149.

Tongkoko Volcano Eruptions

1880, 1843-46, 1821, 1801, 1694, 1683, 1680.