ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Thursday, June 5, 2014, 12:30 PM AKDT (Thursday, June 5, 2014, 20:30 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

The eruption of Pavlof Volcano continues. Two energetic events were recorded in seismic data early this morning (10:05 and 10:45 UTC; 02:05 and 02:45 AKDT) at Pavlof; a third somewhat less energetic event occurred at 16:44 UTC (08:44 AKDT). During the first two events, lightning was detected by the World Wide Lightning Location Network indicating the presence of ash. Satellite images indicated no ash above the meteorological cloud tops determined to be at about 28,000 ft. ASL. Winds were to the west-southwest. These events were likely large collapses of accumulated spatter around the vent, possibly with an explosive component, that sent hot debris cascading down the north flank producing dense but localized low-level clouds of fine ash capable of generating lightning. Similar but somewhat less energetic ash-producing events have been occurring at the volcano in the past several days.

SHISHALDIN VOLCANO (VNUM #311360)
54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Low-level eruptive activity continues at Shishaldin although no activity was observed in partly cloudy satellite views over the past 24 hours. Web camera views of the volcano were obscured by clouds.

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

An explosion occurred at Cleveland volcano at about 06:08 UTC (10:08 AKDT) last night as detected on the Dillingham acoutstic infrasound array and at seismic stations at Korovin Volcano. The event appears to have been of short duration and with similar amplitude to previous explosions at Cleveland. A small, detached cloud with a weak ash signal was observed in a satellite image at 08:04 UTC (00:04 AKDT). The cloud was at an altitude of about 25,000 ft. ASL and about 90 km (56 mi) west-southwest of the volcano and subsequently dissipated. The last explosions at Cleveland occurred in early March, 2014.

VENIAMINOF VOLCANO (VNUM #312070)
56°11'52" N 159°23'35" W, Summit Elevation 8225 ft (2507 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Seismicity remains slightly above background. Slightly elevated surface temperatures were observed in satellite imagery in the past 24 hours that are consistent with the cooling lava flows.

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:

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

Jeff Freymueller, Coordinating Scientist, UAFGI
jeff.freymueller@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.

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