Mount Redoubt volcano in southern Alaska erupted four times on Friday, shooting ash as high as 51,000 feet, scientists said.
The latest eruption took place at 8:30 p.m. (12:30 a.m. Saturday ET), according to the National Weather Service. That eruption followed three other ones earlier Friday.
The eruptions are the latest in a series that began Sunday.
The Alaska Volcano Observatory said the alert level remains at its highest possible designation -- red -- indicating that an eruption is under way or imminent and that the eruption will produce a "significant emission of volcanic ash into the atmosphere."
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