Report on Langila (Papua New Guinea) — September 1993
Bulletin of the Global Volcanism Network, vol. 18, no. 9 (September 1993)
Managing Editor: Edward Venzke.
Langila (Papua New Guinea) Fluctuating ash and vapor emissions
Please cite this report as:
Global Volcanism Program, 1993. Report on Langila (Papua New Guinea). In: Venzke, E (ed.), Bulletin of the Global Volcanism Network, 18:9. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199309-252010.
Papua New Guinea
5.525°S, 148.42°E; summit elev. 1330 m
All times are local (unless otherwise noted)
"Activity declined to a low level in June and remained low through July. Crater 2 intermittently released white-grey ash and vapour clouds in small to moderate amounts. The crater was silent throughout the month, as it has been since the end of May (BGVN 18:05). No glow was observed. The number of Vulcanian explosion earthquakes showed a marked decline to 19 in June from 70 in May and 134 in April. Crater 3 continued to occasionally release weak emissions of white vapour. No activity was recorded from Crater 3 in July.
"Langila's activity increased slightly in August. Crater 2 released white-grey vapour and ash for most of the month. Explosions producing ash falls in inhabited areas were recorded on 6, 8, 20, and 25-26 July. Crater 3 emissions consisted of weak blue vapour.
"Activity appeared to decline in September. Crater 2 emitted weak to moderate amounts of vapour and ash. On a few occasions, falls of ash took place in inhabited areas about 10 km downwind from the vent. Activity at Crater 3 continued at a low level with weak emissions of white and blue vapours. Seismicity was low throughout the month."
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, N. Lauer, L. Sipison, B. Talai, R. Stewart, and D. Lolok, RVO.