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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.
VOLCANO ALERT LEVELS
NORMAL
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
ADVISORY
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
WATCH
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway but poses limited hazards.
WARNING
Hazardous eruption is imminent, underway, or suspected.
AVIATION COLOR CODES
GREEN
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
YELLOW
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
ORANGE
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway with no or minor volcanic-ash emissions [ash-plume height specified, if possible].
RED
Eruption is imminent with significant emission of volcanic ash into the atmosphere likely OR eruption is underway or suspected with significant emission of volcanic ash into the atmosphere [ash-plume height specified, if possible].
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URL: www.avo.alaska.edu/activity/avoreport.php
Page modified: May 16, 2014 09:40
Contact Information: AVO Web Team

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