Report on Langila (Papua New Guinea) — May 1983
Scientific Event Alert Network Bulletin, vol. 8, no. 5 (May 1983)
Managing Editor: Lindsay McClelland.
Langila (Papua New Guinea) Moderate Vulcanian activity, one plume to 7 km
Please cite this report as:
Global Volcanism Program, 1983. Report on Langila (Papua New Guinea). In: McClelland, L (ed.), Scientific Event Alert Network Bulletin, 8:5. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.SEAN198305-252010.
Papua New Guinea
5.525°S, 148.42°E; summit elev. 1330 m
All times are local (unless otherwise noted)
"A generally steady moderate level of Vulcanian explosive activity prevailed in May. On most days when the summit was clear, pale grey or brown emissions were reported from Crater 2. Vulcanian eruption columns rose to about 300 m on 16 May, and 7 km on 17 May. Explosion or rumbling sounds were heard on about 60% of days. Weak glow from Crater 2 was seen on 4 nights: 8, 11, 13, and 25 May. Crater 3 continued to show very mild activity, usually releasing thin white vapours and rarely emitting pale grey clouds.
"Volcano seismicity consisted of occasional Vulcanian explosion earthquakes at an average rate of several per day. On 3, 5, and 16 May explosion earthquakes were followed by periods of about 30 minutes of tremor probably produced by prolonged powerful degassing 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.