Pavlov volcano (Alaska Peninsula), eruption news: new eruption started on 14 Aug, 2007
Samstag Aug 18, 2007 18:26 |
After 11 years of quietness, the most active of Alaska's volcanoes, Pavlov, has begun erupting again.
An abrupt increase in earthquake activity began at Pavlof Volcano on 14 August. The first observed activity was during the night to 15 Aug, when eye witnesses aboard several ships report incandescent blocks down the east-southeast flank of the volcano.
On 16 Aug and the past days, seismic and eruptive activity continued to increase slowly and the main type of activity seems to be the extrusion of an active viscous lava flow from the summit. A strong thermal anomaly is dtectable from satellite imaginery.
Explosions producing ash do not seem to be significant and any ash produced is likely staying below 15 - 20,000 ft above sea level. AVO estimates that the activity will continue over several months and might eventually culminate in one or several stronger explosions. The activity of Pavlov might impact severely on air traffic in a busy sectors where many international flight routes pass, because ash plumes produced by the volcano are very dangerous to jet engines. The detection of any ash clouds will likely be a major task for the involved scientist over the next months.
The last eruption of Pavlof began in September, 1996 and was first reported by observers in Cold Bay. A several-month-long series of ash explosions, lava-fountaining, and lava-flow production ensued. Ash clouds reached as high as 30,000 ft ASL on one occasion, however, most ash clouds were below 20,000 ft ASL. Prior to 1996, Pavlof erupted in 1986 sending ash as high as 49,000 ft ASL on at least one occasion.
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