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AVO Archived Volcano Activity Notifications

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ARCHIVED REPORT
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PAVLOF VOLCANO



LEVEL OF CONCERN COLOR CODE: RED

LAST LEVEL OF CONCERN: ORANGE



Seismic activity increased substantially during the day and at 2:50 pm reached a level that may indicate ejection of ash to altitudes above 25,000 feet ASL. The Level of Concern Color Code is upgraded to RED. The volcano is currently obscured by bad weather, however, AVO received an observation reporting an ash plume up to about 15,000 feet ASL at 1 pm. AVO will continue to monitor the volcano closely and issue further updates as the situation warrants.



The nearest towns to the volcano are Cold Bay (37 mi),

King Cove (30 mi), Sand Point (60 mi), and Nelson Lagoon

(50 mi); these towns could expect light ash fall depending

on wind direction and continuing eruptive activity.

Eruptive activity could cause mudflows and some flooding in the Cathedral River valley north of the volcano. Airborne ash hazards to aircraft may be considerable if a large

explosive event occurs but much less severe during a typical Strombolian phase.



AVO has a seismic network of six stations near the 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].

PDF version of these definitions
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URL: avo.alaska.edu/activity/avoreport_archives.php
Page modified: May 27, 2014 10:23
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