Report on Langila (Papua New Guinea) — 17 August-23 August 2005

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 17 August-23 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, 17 August-23 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 moderate levels of volcanic activity occurred at Langila's Crater 2 during 15-21 August. The activity was marked by occasional sub-continuous forceful emissions of ash. The resultant ash clouds rose as high as 1 km above the volcano (or ~7,600 ft a.s.l.) before drifting N and NW and depositing fine ash in villages along the island's coast. On the evening of the 18th, strong projections of incandescent lava fragments were seen. During the report period, there was no activity at Crater 3 and seismicity was low at the volcano. Based on a pilot report, the Darwin VAAC reported that ash from Langila was visible on 23 August at a height between 3 and 4.6 km (10,000 and 15,000 ft) a.s.l. No ash was visible on satellite imagery.

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)