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Alaska Volcanoes Update
Friday, April 04, 1997, 10:30 AM AST (1930 UTC)
Pavlof Volcano: 55.42°N, 161.9°W 8,262 ft elevation
CURRENT LEVEL OF CONCERN COLOR CODE IS GREEN
Seismicity at Pavlof has returned to a near-background level after
fourteen weeks of eruptive quiescence. No thermal anomalies
are present on satellite images. Although the likelihood of
renewed activity is still above normal, the immediate hazard
level is low. Pavlof will be removed from the itemized report if
quiescence persists for another week, though AVO will continue to
monitor the volcano closely.
Okmok Volcano: 53.4°N, 168.17°W; 2,500 ft (760 m)
Visual reports indicate that the eruption, which began February
13, is continuing at relatively low activity level. Satellite images
throughout the week indicate the presence of hot lava flows in the
caldera, and occasional thin, low levelplumes drifting downwind
from the volcano. Plumes have also been reported by aircraft in
the vicinity. Okmok Volcano is not monitored seismically and is not
assigned a color code. Based on past eruptive history, lava flows
and low-level ash emission could continue for weeks to months.
Eruptive activity could intensify at any time.
Okmok is on the eastern end of Umnak Island, 75 miles
southwest of Dutch Harbor. The nearest settlements are Nikolski
(45 miles W) and former Fort Glenn military base (10 miles E).