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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



Seismicity at Pavlof volcano has continued to increase and has now reached levels indicative of very strong eruptive activity. Although the volcano is not currently visible, the seiemicity is such that ash plumes could be expected to reach altitudes of 30,000 feet or more above sea level and AVO has raised the Level of Concern Color Code to Red. 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). If the eruption intensifies, 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 are 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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Page modified: May 27, 2014 10:23
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