Report on Langila (Papua New Guinea) — February 1982

Scientific Event Alert Network Bulletin, vol. 7, no. 2 (February 1982)
Managing Editor: Lindsay McClelland

Langila (Papua New Guinea) Vulcanian activity; glow and incandescent tephra

Please cite this report as:

Global Volcanism Program, 1982. Report on Langila (Papua New Guinea). In: McClelland, L (ed.), Scientific Event Alert Network Bulletin, 7:2. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.SEAN198202-252010.

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Langila

Papua New Guinea

5.525°S, 148.42°E; summit elev. 1330 m

All times are local (unless otherwise noted)


"Both craters produced occasional Vulcanian explosions during February. Activity appeared to be stronger in the first half of the month. Explosions from Crater 3 rose to 3-4 km on 9 and 11 February, and from Crater 2 to 6-7 km on the 13th and 14th. Glow and incandescent tephra ejections were observed at Crater 2 most nights the first half of the month, occasionally the second half. At Crater 3 incandescent tephra emission was reported only on 7 February.

"The main feature of February seismicity was the registration of several Vulcanian explosion earthquakes per day. Larger events were recorded 8-17 February. Two periods of frequent, brief, small-amplitude seismic events occurred 6-9 and 13-16 February. This activity became more intense on the 14th and 15th, giving rise to signals resembling discontinuous seismic tremor."

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.