Report on Langila (Papua New Guinea) — September 1982
Scientific Event Alert Network Bulletin, vol. 7, no. 9 (September 1982)
Managing Editor: Lindsay McClelland.
Langila (Papua New Guinea) Vulcanian explosions; ash emissions
Please cite this report as:
Global Volcanism Program, 1982. Report on Langila (Papua New Guinea). In: McClelland, L (ed.), Scientific Event Alert Network Bulletin, 7:9. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.SEAN198209-252010.
Papua New Guinea
5.525°S, 148.42°E; summit elev. 1330 m
All times are local (unless otherwise noted)
"Activity in September was similar to that seen in August. However, Crater 2 showed a more intense phase of activity in the second half of the month which included more frequent Vulcanian explosions and periods of continuous ash emission. Light to moderate ashfalls at the observation post 10 km N of the volcano were recorded on 5 days but mostly in the second half of the month. No crater incandescence was seen. Blue vapour emissions from Crater 2 were observed on several days at the beginning and end of the month.
"Crater 3 showed little or no activity apart from weak emissions of white-grey vapour. The greyish color is not considered to be caused by entrained ash but to be an effect of peculiar light conditions [during early-morning periods of observation].
"Seismicity was generally at a low level, although explosion earthquakes were associated with the Vulcanian activity at Crater 2."
Geologic Background. Langila, one of the most active volcanoes of New Britain, consists of a group of four small overlapping composite basaltic-andesitic cones on the lower eastern flank of the extinct Talawe volcano. Talawe is the highest volcano in the Cape Gloucester area of NW New Britain. A rectangular, 2.5-km-long crater is breached widely to the SE; Langila volcano was constructed NE of the breached crater of Talawe. An extensive lava field reaches the coast on the north and NE sides of Langila. Frequent mild-to-moderate explosive eruptions, sometimes accompanied by lava flows, have been recorded since the 19th century from three active craters at the summit of Langila. The youngest and smallest crater (no. 3 crater) was formed in 1960 and has a diameter of 150 m.
Information Contacts: C. McKee, RVO.