Report on Langila (Papua New Guinea) — September 1991
Bulletin of the Global Volcanism Network, vol. 16, no. 9 (September 1991)
Managing Editor: Lindsay McClelland.
Langila (Papua New Guinea) Frequent tephra emission; tremor declines
Please cite this report as:
Global Volcanism Program, 1991. Report on Langila (Papua New Guinea). In: McClelland, L (ed.), Bulletin of the Global Volcanism Network, 16:9. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199109-252010.
Papua New Guinea
5.525°S, 148.42°E; summit elev. 1330 m
All times are local (unless otherwise noted)
"Moderate to strong activity persisted at Langila throughout September. Ash-laden vapor emissions were released almost continuously from Crater 2, accompanied by weak to loud rumbling sounds. A weak glow was visible on most nights, except 21-25 September. Activity at Crater 3 consisted of occasional Vulcanian explosions, at rates of 30-80/day. The activity was stronger 23-26 September and a steady night glow was visible 25-26 September.
"The amplitude of discontinuous tremor declined markedly in late August, while cumulative daily tremor duration dropped to <=100 minutes from levels that had been as high as 200 minutes/day since mid-June."
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: P. de Saint-Ours and C. McKee, RVO.