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ALASKA VOLCANO OBSERVATORY INFORMATION STATEMENT
Tuesday, June 25, 2013 3:41 AM AKDT (Tuesday, June 25, 2013 11:41 UTC)


PAVLOF VOLCANO (CAVW #1102-03-)
55°25'2" N 161°53'37" W, Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Seismic data over the past several hours (beginning about 06:50 UTC) indicates that the eruption of Pavlof Volcano has escalated. The level of seismicity now is comparable to the strongest seismic activity detected during the earlier part of the 2013 eruption on May 16-17. The seismicity is characterized by continuous intense tremor and frequent small explosions that are likely associated with lava fountaining and unknown amounts of ash production.

Cloudy sky conditions have prevented visual observations of the volcano and the most recent satellite imagery does not indicate the presence of any high altitude ash clouds, although strong thermal signals at the summit have been evident in recent imagery.

At this level of unrest it is likely that ash emission is occurring, but this has not been confirmed in satellite imagery. It is possible for activity at the volcano to continue to increase and this may result in the generation of ash plumes that rise above 20,000 feet above sea level. The highest ash plumes observed thus far have been about 22,000 feet above sea level on May 19-20. AVO will continue to monitor the situation closely and issue further information as it becomes available.

VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478

CONTACT INFORMATION:
John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Jessica Larsen, Acting Coordinating Scientist, UAFGI
jflarsen@alaska.edu (907) 474-7992

The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.