aleutian arc

A cluster of earthquakes struck about 110 miles southeast of Unalaska throughout the day Tuesday. Scientists say the earthquakes are normal for the region, and no one has reported feeling them in the U.S. Geological Survey’s Felt Report database.

A magnitude-6.4 earthquake hit about 25 miles east of Nikolski Tuesday morning, and was felt by residents in Nikolski, Unalaska, and Akutan. The…

Scientists have raised Pavlof Volcano's alert level, after the volcano began showing signs of restlessness. The Alaska Volcano Observatory issued an…