Updated

The Latest on the eruption of a volcano in Alaska (all times local):

1:40 p.m.

A volcano on a remote island in Alaska's Aleutian chain has simmered down after erupting and prompting an aviation alert.

The Alaska Volcano Observatory said Friday the Bogoslof (BOH-goh-slawf) volcano sent an ash plume about 20,000 feet in the air in its eighth explosion detected since Dec. 16.

The latest eruption caused the observatory to issue its highest alert for aircraft, but the Federal Aviation Administration says the eruption has had no effect on flight operations.

Observatory geologist Chris Waythomas says the volcano has quieted down, but the alert remains in place.

He says most of the volcano's vent is underwater, which adds steam to ash plumes when magna is dislodged.

The volcano began erupting shortly before midnight Thursday. It is located on an island in the Bering Sea about 850 miles southwest of Anchorage.

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2:10 a.m.

A volcano on a remote island in Alaska's Aleutian chain has erupted again, prompting an aviation alert.

The Alaska Volcano Observatory says the Bogoslof (BOH-goh-slawf) volcano sent an ash plume about 20,000 feet in the air by early Friday morning.

The eruption caused the observatory to issue its highest alert level for aircraft.

During an eruption of the volcano last week, the Federal Aviation Administration said flights were rerouted around the plume.

The center says the volcano began erupting shortly before midnight Thursday and its activity was recorded by seismic data and in satellite images.

The volcano is located on an island of the same name in the Bering Sea about 850 miles southwest of Anchorage.