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Report on Karangetang (Indonesia) — 13 February-19 February 2019

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 13 February-19 February 2019
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2019. Report on Karangetang (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 13 February-19 February 2019. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (13 February-19 February 2019)


Karangetang

Indonesia

2.781°N, 125.407°E; summit elev. 1797 m

All times are local (unless otherwise noted)


PVMBG reported that during 13-19 February sometimes-dense white plumes rose as high as 400 m above the rim of Karangetang’s Main Crater. White emissions that were occasionally bluish rose mostly 50-150 m above Kawah Dua’s (North Crater) crater rim, though on 18 February the plumes were grayish and rose 200-300 m. Roaring sounds from the volcano were occasionally noted at an observation post. The Alert Level remained at 3 (on a scale of 1-4), and residents were warned to remain outside of the 2.5-km exclusion zone around the N and S craters, and additionally within 3 km WNW and 4 km NW.

Geologic Background. 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 island. 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 in the historical record (Catalog of Active Volcanoes of the World: 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)