The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program. Updated by 2300 UTC every Wednesday, these notices are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of eruptions during the week, but rather a summary of activity that meet selected criteria. Carefully reviewed, detailed reports are published monthly in the Bulletin of the Global Volcanism Network. The World Organization of Volcano Observatories (WOVO) website (http://www.wovo.org/) lists the regional volcano observatories that have the most authoritative data for many of these events.
A new eruption, or volcanic unrest was detected by volcanologists and published by the GVP. The details are summarized in the following message:
The Darwin VAAC reported that on 20 August an ash plume from Manam rose 2.1 km (7,000 ft) a.s.l. and drifted W and WSW, based on satellite data and a ground-based observer. On 31 August an ash plume rose to 4.6 km (15,000 ft) a.s.l. and drifted W.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)