Not one but two volcanoes on the same island in Alaska’s Aleutian chain were rocked by earthquakes on Friday, prompting concerns about a possible eruption.
“We’re still getting earthquakes up above magnitude 3 going on quite regularly,” said John Power, a research geophysicist with the U.S. Geological Survey stationed at the Alaska Volcano Observatory in Anchorage., the middle of three volcanoes on Tanaga Island, located about 1,250 miles southwest of Anchorage.
A third volcano on the island, Sajaka, about 2 miles to the west of Tanaga, is not showing any sign of activity.Since the island is uninhabited, the thick, viscous lava that could flow in an eruption would not cause harm. The nearest community, Adak, is about 65 miles to the east, on a separate island.
Where and how far any ash would go would depend on numerous factors. Fine ash drifting to cities can cause respiratory problems for people and animals, interfere with electrical equipment and damage air filters and gasoline engines. “We did see some signals that might have been very minor eruptive activity, but we were never able to confirm that,” Power said.
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