Report on Langila (Papua New Guinea) — 24 August-30 August 2005

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 24 August-30 August 2005
Managing Editor: Gari Mayberry

Please cite this report as:

Global Volcanism Program, 2005. Report on Langila (Papua New Guinea). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 24 August-30 August 2005. Smithsonian Institution and US Geological Survey.

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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)


RVO reported that during 22-28 August, modest eruptive activity was observed at Langila's Crater 2. Occasional forceful emissions of ash produced plumes that rose ~1 km above the crater (or 7,600 ft a.s.l.) on 22 and 25 August, but reached only several hundred meters after that. The ash plumes drifted N and NW resulting in fine ashfall in downwind areas, including the town of Kilenge. Seismicity was at low levels, consisting mainly of low-frequency earthquakes. The Darwin VAAC reported that a plume was visible on satellite imagery on 30 August extending NNW.

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.

Sources: Rabaul Volcano Observatory (RVO), Darwin Volcanic Ash Advisory Centre (VAAC)