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Fog on Cook Inlet partly obscures the rumbling Mount Redoubt at sunset Tuesday.
Fog on Cook Inlet partly obscures the rumbling Mount Redoubt at sunset Tuesday.
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ANCHORAGE, Alaska — Mount Redoubt, a volcano 100 miles southwest of Anchorage, is rumbling, prompting geologists to warn that an eruption may be imminent. The Alaska Volcano Observatory has been monitoring activity around the clock since the weekend.

Volcanoes in Alaska typically erupt explosively, shooting ash almost 8 miles high.

The last time the 10,197-foot peak blew was during a five-month stretch starting in December 1989. It disrupted international air traffic and created a layer of volcanic dust throughout the Anchorage area.