[4] Karangetang is the tallest mountain in offshore North Sulawesi, at 1827 meters above sea level.

[5] On 9 June 2009 the Volcanological Survey of Indonesia raised the eruption alert status of Karangetang to Level Orange.

[7][8] On 11 March 2011, a few hours after an earthquake in Japan caused a Pacific-wide tsunami, Mount Karangetang again erupted.

[9] There were no reports of serious damage or casualties, though lava and hot gas clouds were emitted onto its slopes.

[10] Dense white gas-and-steam plumes were visible from Karangetang on most days during 13-19 September, rising as high as 300 m. Seismicity during 1-7 September indicated lava from the SW side of Main Crater (S crater) continued to effuse but at a decreased rate, and that the number of earthquakes indicating avalanches had also decreased, according to Vulcanological Survey of Indonesia.