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ARCHIVED REPORT
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Alaska Volcanoes Update

Friday, January 10, 1997, 12:00 noon AST (2100 UTC)



Pavlof Volcano: 55.42N, 161.9W 8,262 ft elevation

CURRENT LEVEL OF CONCERN CODE IS YELLOW



A pause in eruptive activity continues at Pavlof Volcano. During the past

week, AVO recorded very low levels of seismicity at the volcano.

The FAA received no pilot reports of ash or lava eruption and

weather observers in Cold Bay report seeing no eruptive activity

during breaks in the weather this week. The last sighting of weak

ash emission from Pavlof was on Thursday, January 2.



Although the current pause is now in its second week, based on the

previous pattern of eruptive activity at Pavlof, a resumption of

more energetic ash and lava emission could resume with little

or no warning. AVO continues to monitor the volcano closely and

will issue further updates as the situation changes.



Iliamna Volcano: 60.04N 153.17W; 10,196 ft elevation

The seismic swarm that began on 1 August 1996 beneath Iliamna

Volcano continued during the past week at an average rate of 11

earthquakes per day.

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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