Report on Kadovar (Papua New Guinea) — 24 January-30 January 2018
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 24 January-30 January 2018
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2018. Report on Kadovar (Papua New Guinea). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 24 January-30 January 2018. Smithsonian Institution and US Geological Survey.
Papua New Guinea
3.608°S, 144.588°E; summit elev. 365 m
All times are local (unless otherwise noted)
RVO reported that the eruption at Kadovar continued during 23-24 January at levels similar to the previous few days. Main Crater produced light-gray to brown ash plumes that rose at most 100 m and drifted a few tens of kilometers W. Weak incandescence from Main Crater was visible at night. The lava dome at the SE Coastal Vent continued to grow and was an estimated 50 m a.s.l. (the water depth in that area was unknown) and extends out from the coast 150-200 m. The dome glowed red at night. Seismicity was low to moderate, with one high-frequency event, and 12 significant numerous small low-frequency events. Strong sulfur dioxide emissions were detected.
Geologic Background. The 2-km-wide island of Kadovar is the emergent summit of a Bismarck Sea stratovolcano of Holocene age. Kadovar is part of the Schouten Islands, and lies off the coast of New Guinea, about 25 km N of the mouth of the Sepik River. The village of Gewai is perched on the crater rim. A 365-m-high lava dome forming the high point of the andesitic volcano fills an arcuate landslide scarp that is open to the south, and submarine debris-avalanche deposits occur in that direction. Thick lava flows with columnar jointing forms low cliffs along the coast. The youthful island lacks fringing or offshore reefs. No certain historical eruptions are known; the latest activity was a period of heightened thermal phenomena in 1976.
Source: Rabaul Volcano Observatory (RVO)