Report on Kadovar (Papua New Guinea) — 7 March-13 March 2018
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 7 March-13 March 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, 7 March-13 March 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 emissions from Kadovar’s Main Crater were white from 1 March, until an explosion on 1800 on 5 March was followed by gray emissions through 8 March. The gray plumes rose less than 360 m above the vent and drifted SE. Noises were described as roaring and rumbling during 1-2 and 6-8 March, and booming on 5 March. The lava dome at the SE Coastal Vent continued to grow and rose to 7-8 m above sea level on 1 March, 10-11 m on 2 March, and 10-17 m on 8 March. Dark gray ash plumes rose from the dome. Nighttime incandescence was noted from both Main Crater and the SE vent.
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)