ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Tuesday, March 29, 2016, 1:41 PM AKDT (Tuesday, March 29, 2016, 21:41 UTC)


PAVLOF VOLCANO (VNUM #312030)
55°25'2" N 161°53'37" W, Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Based on a decline in ash emissions and seismicity, AVO lowered the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH yesterday at 6:01 pm AKDT (18:01 UTC). Periods of low-level ash emission and somewhat elevated seismicity persisted overnight, but decreased during the early morning hours. A satellite image from this morning at 6:25 am AKDT (14:25 UTC) showed minor ash emissions from the volcano. Clear web camera views from this morning confirmed intermittent low-level ash emissions at the volcano at maximum altitudes of 15,000 feet above sea level. Areas of drifting remnant ash from the initial energetic emissions on March 27 and 28 continue to be observed in satellite data over Bristol Bay and Interior Alaska. AVO received confirmed reports of trace ashfall (less than 1/32 in) that occurred yesterday near Dillingham in southwest Alaska. No significant ashfall is expected in communities at this time. Updated information about the location and forecasted movement of the volcanic ash cloud can be found at National Weather Service Alaska Aviation Weather Unit http://aawu.arh.noaa.gov/

Seismic activity remains elevated at levels above background and over the past 24 hours has been characterized by short tremor bursts. Occasionally, small explosions at the summit have produced airwave signals on the local seismic network. Infrasound (pressure sensor) signals from Pavlof were also detected on an array of sensors in Dillingham overnight.

Although the intensity of the eruption has diminished, it is possible for conditions to change at any time and more significant ash emissions may resume with little to no warning. AVO will continue to monitor the volcano closely.


CLEVELAND VOLCANO (VNUM #311240)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Moderately elevated surface temperatures were observed at the summit in partly cloudy satellite views overnight. No significant activity was detected in seismic or infrasound (pressure sensor) data.

OTHER ALASKA VOLCANOES

Other Alaska volcanoes show no signs of significant unrest: http://www.avo.alaska.edu/activity/

AVO scientists conduct daily checks of earthquake activity at all seismically-monitored volcanoes, examine web camera and satellite images for evidence of airborne ash and elevated surface temperatures, and consult other monitoring data as needed.

For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://www.avo.alaska.edu/color_codes.php

FOR MORE INFORMATION ON ALASKA VOLCANOES: http://www.avo.alaska.edu

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

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CONTACT INFORMATION:

Michelle Coombs, Scientist-in-Charge, USGS
mcoombs@usgs.gov (907) 786-7497

Jessica Larsen, Acting Coordinating Scientist, UAFGI
faust@gi.alaska.edu (907) 322-4085



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.