Another volcano in Alaska is heating up, with seismic instruments signaling a possible eruption, scientists said Monday.
Tremors were detected at Pavlof Volcano, 625 miles southwest of Anchorage, according to the Alaska Volcano Observatory. Satellite imagery showed the mountain was "very, very hot," said John Power, the U.S. Geological Survey scientist in charge at the observatory.
The aviation alert level for Pavlof was raised from "yellow" to "orange." A major ash emission could threaten international flights.
Pavlof is 37 miles from the community of Cold Bay, which was notified of the new activity that began about 8 a.m. Monday. Because of clouds, the volcano was not visible to the village of 100.