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LEVEL OF CONCERN COLOR CODE: YELLOW
The seismicity at Akutan volcano has been gradually declining over the past two weeks and continues to slowly diminish. Earthquakes plot widely on the eastern half of the island with a cluster, shallower than 10 km, located about 8-10 km due east of the summit cinder cone, about 5 km west of the city of Akutan. Although the threat of an imminent eruption has decreased, the volcano remains restless. Data from five seismic stations near Akutan are transmitted in real-time to AVO, which is staffed around the clock to provide analysis and interpretation of seismicity.
The following scenarios are still considered possible:
(1) Earthquake activity continues to decrease, with some
fluctuations, and no eruption occurs.
(2) Earthquake activity intensifies leading to an eruption
of a lava flow within the summit caldera or from the flank,
accompanied by ash plumes and explosions.
(3) Earthquake activity intensifies leading to an explosive
eruption accompanied by large ash plumes.
AVO is closely monitoring the unrest at Akutan volcano.
COOK INLET VOLCANOES
Seismic activity at Spurr, Redoubt, Iliamna, and Augustine
volcanoes remains at normal background levels. We
maintain a computerized alarm system capable of notifying
AVO seismologists during non-business hours should unusual
seismic activity occur.