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Karangetang volcano on Siau Island (2006, photo: Donald Tapehe)
Karangetang volcano on Siau Island (2006, photo: Donald Tapehe)

Latest news:

Karangetang volcano (Sangihe Islands, Indonesia): eruption increasing
Friday, Mar 18, 2011
The activity of Karangetang volcano is increasing. The Indonesian Volcanological Survey has raised the highest level of alert (4), after pyroclastic f... [more]
Karangetang volcano (Sangihe Islands, Indonesia): new activity
Saturday, Mar 12, 2011
A new eruption started at Karangetang volcano yesterday 11 March (the day the massive Japan earthquake markes history). Karangetang is located on the ... [more]

Karangetang (Api Siau) volcano

stratovolcano 1784 m (5,853 ft)
North Sulawesi & Sangihe Islands (Indonesia), 2.78°N / 125.48°E
Current status: minor activity or eruption warning (3 out of 5)
Typical eruption style: Explosive. Formation of lava domes and pyroclastic flows.
Karangetang volcano on Api Siau IslandKarangetang (Api Siau) volcano eruptions: 1675, 1712, 1825, 1864, 1883, 1886, 1887, 1892, 1899, 1900, 1905, 1921, 1922, 1924, 1926, 1930, 1930, 1935, 1940, 1940, 1941, 1947, 1947, 1948, 1949, 1952, 1953, 1961, 1961, 1962-62, 1965-67, 1967, 1970-71, 1972-76, 1976-77, 1978, 1979, 1980, 1982, 1983-88, 1989, 1991-93, 1995, 1996-97, 1998, 1999-2003, 2004-2005. 2008-9, 2010, 2011
Karangetang is one of Indonesia's most active volcanoes. Located on the remote Api Siau Island north of N Sulawesi, it is notorious for building lava domes and producing dangerous pyroclastic flows.

Background:

Karangetang (or Api Siau) volcano lies at the northern end of the island of Siau, north of Sulawesi. The 1784-m-high stratovolcano contains five summit craters along a N-S line. Karangetang is one of Indonesia's most active volcanoes, with more than 40 eruptions recorded since 1675 and many additional small eruptions that were not documented.

Twentieth-century eruptions have included frequent explosive activity sometimes accompanied by pyroclastic flows and lahars. Lava dome growth has occurred in the summit craters; collapse of lava flow fronts has also produced pyroclastic flows.
5 eruptions in the 20th century (1940, 1972, 1976, 1983 and 1991) caused fatalities.
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Source: GVP, Smithsonian Institution