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AVO Archived Volcano Activity Notifications

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ARCHIVED REPORT
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VENIAMINOF



Eruptive activity continues to be reported at Veniaminof Volcano. Pilots from commercial airlines today reported observing a low ash cloud reaching nearly a thousand feet above the volcano while intermittent venting of black ash continued from the central cone. Observers in nearby Perryville reported seeing clouds of black "smoke" spurt from the summit of the volcano beginning Friday, July 30, 1993, and continuing through Sunday. A small eruption plume was observed on satellite imagery by the National Weather Service on Friday, but none was seen on Saturday, Sunday, or today.



At the present time, the exact nature of the volcanic activity at Veniaminof Volcano is unknown, although it is likely to be similar to previous historic eruptions, e.g., the 1983-84 event. If this type of activity were to continue, occasional ash falls are possible at Perryville and pilots should be aware of ash clouds at elevations generally not exceeding 20,000 feet.



SEGUAM



The U.S. Coast Guard on Saturday, July 31, 1993, reported a lava and ash eruption at Seguam Volcano. No new information has come in regarding a continuation of Saturday's activity. Seguam was most recently active in May 1993.

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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Page modified: May 27, 2014 10:23
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