Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that white emissions that were sometimes dense rose 50-400 m above Karangetang’s summit during 13-19 November. The Alert Level remained at 3 (on a scale of 1-4) and the public was advised to stay 2.5 km away from Kawah Dua (North Crater) and the Main Crater (South Crater) with an extension to 3.5 km along the W, SW, S, and SE flanks.

Geological Summary. Karangetang (Api Siau) volcano lies at the northern end of the island of Siau, about 125 km NNE of the NE-most point of Sulawesi. The stratovolcano contains five summit craters along a N-S line. It 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 (Neumann van Padang, 1951). 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 have produced pyroclastic flows.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)