Report on Langila (Papua New Guinea) — April 1992
Bulletin of the Global Volcanism Network, vol. 17, no. 4 (April 1992)
Managing Editor: Lindsay McClelland
Langila (Papua New Guinea) Incandescent tephra; ash clouds; lava flows stop
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, 17:4. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199204-252010.
Papua New Guinea
5.525°S, 148.42°E; summit elev. 1330 m
All times are local (unless otherwise noted)
"Moderate eruptive activity continued during April. Crater 2 emitted moderate volumes of pale grey ash and vapour, and occasionally there were stronger explosions that propelled ash clouds several kilometers above the summit. Ashfalls to 10 km from the source were common. Explosions were heard at the observation post . . . on most days between 1 and 11 April. Rumbling and roaring sounds were heard on 27-30 April. Steady, weak crater glow was seen on most nights. Crater 3 activity was mild at the beginning of the month, and only weak white emissions were seen. Lava flows that began 6 March ceased on 1 April. Crater 3 became more active on 6 April; however, the ash content of emissions remained low. Incandescent lava ejections and/or glow were reported on most nights beginning 6 April. The ejections rose as much as 500 m above the crater. Beginning on 9 April, the explosive activity was stronger and emissions contained more ash. Explosion noises were reportedly loud at the observation post.
"In early April, seismicity appeared to mainly reflect the activity at Crater 2, while during 7-14 April, most of the seismicity was associated with Crater-3 activity. All seismic monitoring ceased on 19 April with the failure of both seismic stations."
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.