Report on Kadovar (Papua New Guinea) — 5 February-11 February 2020
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 5 February-11 February 2020
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2020. Report on Kadovar (Papua New Guinea). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 5 February-11 February 2020. 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 1 January-7 February with frequent (hours to days) Vulcanian explosions from Main Vent at the summit. The explosions ejected rocks and ash plumes that rose 300-400 m above the vent and drifted NE and E. Residents on Blup Blup (15 km N) reported rumbling and nighttime summit incandescence. Volcanic plumes were sometimes observable in Wewak (105 km W). The Darwin VAAC stated that on 6 February an ash plume rose to 2.1 km (7,000 ft) a.s.l. and drifted SE.
Geologic Background. The 2-km-wide island of Kadovar is the emergent summit of a Bismarck Sea stratovolcano of Holocene age. It 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. Prior to an eruption that began in 2018, a lava dome formed the high point of the andesitic volcano, filling an arcuate landslide scarp open to the south; 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. A period of heightened thermal phenomena took place in 1976. An eruption began in January 2018 that included lava effusion from vents at the summit and at the E coast.
Sources: Rabaul Volcano Observatory (RVO), Darwin Volcanic Ash Advisory Centre (VAAC)