Report on Kadovar (Papua New Guinea) — 21 February-27 February 2018
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 21 February-27 February 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, 21 February-27 February 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 lava continued to flow from the SE Coastal Vent resulting in the connection of a reemerged lava island to the coast of Kadovar within a few days of the 1 February collapse. During 14-22 February continuous plumes of white vapor rose from both Main Crater and SE Coastal Vent, punctuated by dense ash emissions from both areas during 16 and 20-22 February and occasional booming noises. Ash plumes rose 370 m above the island and drifted SE, though on 22 February the winds blew the plumes N and NW. Incandescence from both areas was visible on 22 February. A sulfur odor was noticed by residents on Blup Blup (15 km N) on 16 and 22 February.
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)