SI/USGS Weekly Volcano Activity Report for 11/25-12/1/2009

We get a new update from the Smithsonian/USGS Global Volcanism Program ...

Highlights (not counting Soufriere Hills or Gaua) include:

  • The Weekly Report mentions the mystery eruption/noneruption of Karkar in PNG. Specifically, they report:

    The report also stated that ash had merged with a thunderstorm cloud and had become unidentifiable.

    Two ash plumes (11/25, 26) that reached at least 9.1 km / 30,000 feet were reported by the Darwin VAAC ... but as we know, it is far from clear that anything actually happened at Karkar last week.

  • Activity has quieted significantly at Chaiten in Chile, with only a "diffuse plume" from the dome complex that started forming in May 2008.
  • Karymsky, a recent MVP, produced a ~3.8 km / 12,000 foot ash column as its eruptive activity continued.
  • Ecuador's Sangay produced two ash plumes over the last week, one reaching as high as 7.9 km / 26,000 feet according to reports from pilots in the area.
  • Rabaul in PNG was busy shaking windows 20 km from the volcano as the Tavurvur cone produced a number of explosions, along with ash and an incandescent glow at the crater.

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