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AVO Archived Volcano Activity Notifications

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ARCHIVED REPORT
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VENIAMINOF



Eruptive activity continued at Veniaminof Volcano yesterday and into last night. At midday on Tuesday, pilots of a Reeve Aleutian Airways plane and personnel from the U.S. Fish and Wildlife Service (Alaksa Peinsula/Becharof National Wildlife Refuge) observed the eruption site. They described intermittent ash emission and block ejection from the prominent cinder cone located within the summit caldera at an elevation of 7075 feet. Material was being thrown to an estimated height of 500-1000 feet above the cone. Steam was emanating from a 200-300-yd-wide depression in the glacial ice east of the base of the cone.



Last Night, residents of Port Heiden, located approximately 50 miles northeast of the volcano, reported a very light ash fall. Residents of Perryville, Chignik, and Chignik Lake, south and east of the volcano, reported hearing a "rumbling noise" accompanied by a slight tremor about 22:00 last night.



Today, AVO received no reports of eruptive activity at Veniaminof Volcano. However, heavy clouds have obscured the mountain for most of the day, presumably hampering observations by aircraft and satellite. It is possible that intermittent eruption of ash above the volcanoe's summit continues. Ash falls are possible at Perryville and other nearby villages. Pilots should be aware of possible ash clouds at elevations generally not exceeding 20,000 feet above sea level.



Today, a scientist from the Geophysical Institute at the University of Alaska installed a seismometer in the town of Perryville, 20 miles south of the volcano. An additional instrument will be installed closer to the volcano and should aid in efforts to identify activity at Veniaminof.



SEGUAM



AVO has received no new information regarding a continuation of eruptive activity at Seguam Volcano.

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: avo.alaska.edu/activity/avoreport_archives.php
Page modified: May 27, 2014 10:23
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