Logo link to homepage

Report on Witori (Papua New Guinea) — 13 November-19 November 2002


Witori

Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
13 November-19 November 2002
Managing Editor: Gari Mayberry

Please cite this report as:

Global Volcanism Program, 2002. Report on Witori (Papua New Guinea). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 13 November-19 November 2002. Smithsonian Institution and US Geological Survey.

Weekly Report (13 November-19 November 2002)

Witori

Papua New Guinea

5.576°S, 150.516°E; summit elev. 724 m

All times are local (unless otherwise noted)


Volcanic activity continued at Pago and residents in relatively low-risk areas near the volcano were told it was safe to return to their homes according to a news article. The eruption of Pago began in August, leading to the evacuation of 12,000-15,000 residents.

Geological Summary. The Witori caldera (5.5 x 7.5 km) on the northern coast of central New Britain contains the active Pago cone. The Buru caldera cuts the SW flank. The gently sloping outer flanks consist primarily of dacitic pyroclastic-flow and airfall deposits produced during a series of five major explosive eruptions from about 5,600 to 1,200 years ago, many of which may have been associated with caldera formation. The post-caldera Pago cone may have formed less than 350 years ago; it has grown to a height above the Witori caldera rim, and a series of ten dacitic lava flows from it covers much of the caldera floor. The youngest of these was erupted during 2002-2003 from vents extending from the summit nearly to the NW caldera wall.

Source: Asia Pacific