Report on Langila (Papua New Guinea) — 4 May-10 May 2005

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 4 May-10 May 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, 4 May-10 May 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)


Between 28 April and 4 May sub-continuous forceful emissions of thick white to gray ash-laden clouds rose about 700-800 m above the summit crater. Glow was visible during night; projections of incandescent lava became frequent during the latter part of the period. On the afternoon of 4 May the emissions changed to dark ash clouds and there were explosions with booming noises. A thin plume from the 4 May activity was seen on satellite imagery extending over 100 km NW. Very bright glow was visible during the night with moderate projections of incandescent lava fragments. Reports received by mid-day on 5th indicated the activity to be continuing. A lava flow was also produced. Light to moderate ashfall was reported to the NW at Kilenge.

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)