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ARCHIVED REPORT
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PAVLOF VOLCANO



LEVEL OF CONCERN COLOR CODE: ORANGE

LAST LEVEL OF CONCERN: RED



Eruptive activity at Pavlof Volcano continues at an increased rate but the seismicity is down from the levels of this morning. Pilot reports received between 10:00 AM and 1:45 PM indicate no ash visible above the 19,000 foot cloud top level. The LEVEL OF CONCERN COLOR CODE has therefore been downgraded to ORANGE. The current seismicity suggests that strong explosive short-lived bursts of ash are still occurring but to altitudes less than 19,000 feet ASL. Weather conditions prevent direct observation of the volcano. AVO will monitor the volcano closely and adjust the Level of Concern Color Code as necessary.



Pavlof is located 600 miles southwest of Anchorage. The

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

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

(50 mi NE). These towns could expect light ash fall

depending on wind direction and level of eruptive

activity. Mudflows and some flooding could occur near the

volcano. The hazard to aircraft from airborne ash may be

considerable if a large explosive event occurs, however

during the more typical lava fountaining activity at

present, this hazard is minor.



Seismic activity at Spurr, Redoubt, and Augustine

volcanoes remains at normal background levels.



ADDITIONAL INFORMATION



AVO maintains a computerized alarm system capable of

notifying AVO seismologists during non-business hours

should unusual seismic activity occur at Spurr, Iliamna,

Augustine, or Akutan volcanoes. AVO continues to test new

seismic networks at Pavlof, Dutton, Makushin, Akutan, and

Katmai area volcanoes. Reports on these volcanoes will be

added to this update as data acquisition and analysis

become reliable. We anticipate that this will occur by

mid-November.



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
Contact Information: AVO Web Team

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