Report on Langila (Papua New Guinea) — July 1992
Bulletin of the Global Volcanism Network, vol. 17, no. 7 (July 1992)
Managing Editor: Lindsay McClelland.
Langila (Papua New Guinea) Explosive activity and small lava flow
Please cite this report as:
Global Volcanism Program, 1992. Report on Langila (Papua New Guinea). In: McClelland, L (ed.), Bulletin of the Global Volcanism Network, 17:7. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199207-252010.
Papua New Guinea
5.525°S, 148.42°E; summit elev. 1330 m
All times are local (unless otherwise noted)
"Weak-to-moderate eruptive activity continued in July. Lava effusion at Crater 3 from 25 to 27 July or longer was associated with increased explosive activity late in the month.
"Activity at Crater 2 was at a low level 1-19 July with emissions of weak white vapour, occasionally blue or containing ash. A weak explosion probably associated with Crater 2 was heard on 1 July. There was no night glow during this period. Crater 2 was more active from 20 July until the end of the month. Loud-to-low rumbling noises and explosions were heard, accompanied by emissions of weak-to-moderate, occasionally thick, grey ash clouds. Weak night glow was observed from 20 July onward.
"Activity at Crater 3 was also low for most of the month, punctuated by occasional forceful emissions of grey-to-brown ash clouds, sometimes reaching more than 1 km above the summit. Activity increased to a moderate level from 25 July with audible explosive activity, night glow from the summit crater, and emission of a lava flow on the cone's N slope. The summit was obscured by clouds from 25 July and it was not clear whether the flow was still active. The explosion noises that started on 25 July continued until the end of the month. Light ashfalls ~10 km downwind from the volcano were noted on 5 and 22 July. Seismic activity was at a low level throughout the month despite the increase in visual activity."
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: B. Talai and C. McKee, RVO.