Report on Langila (Papua New Guinea) — October 1994

Bulletin of the Global Volcanism Network, vol. 19, no. 10 (October 1994)
Managing Editor: Richard Wunderman.

Langila (Papua New Guinea) Moderate intermittent Vulcanian explosions from both craters

Please cite this report as:

Global Volcanism Program, 1994. Report on Langila (Papua New Guinea). In: Wunderman, R (ed.), Bulletin of the Global Volcanism Network, 19:10. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199410-252010.

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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)


Eruptive activity in September and October at both craters consisted of moderate and intermittent Vulcanian explosions. Crater 3 was active during the first nine days of the month. It released a moderately thick vapor plume, with occasional dark gray ash clouds, accompanied by explosions and rumbling sounds, and resulting in light ash falls onto the NW flank and coastal villages. For the remainder of September and October, it only emitted very thin wisps of vapor, occasionally accompanied by blue vapor.

At Crater 2, background levels of moderate white and blue vapour emissions continued, and very weak night glow was seen on 7 September. However, activity picked up on the 12th and 13th with occasional dark ash-laden, convoluting Vulcanian explosions. Similar low-level eruptive activity resumed on 15-18, 24, and 28-29 September.

A good correlation could be seen between the level of seismicity and volcanic activity in September. The two local seismographs recorded 2-5 explosive events/day during 1-9 September at Crater 3, and then 2-8 events/day during each of the intermittent phases of activity at Crater 2. Seismicity remained at a low level throughout October.

Emissions from Crater 2 in October consisted of thin white vapour with occasional dark gray, ash-laden convoluting columns rising up to a few hundred meters above the crater. Fine ash fell on downwind coastal areas. Weak night glow accompanied these explosions on 3, 6, 9, 21-22, and 30 October.

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 and P. de Saint-Ours, RVO.