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.
Elevated earthquake activity was reported at both Tanaga and Takawangha volcanoes on uninhabited Tanaga Island, hundreds of miles from Anchorage.
Seismic activity ramped up earlier this week at Tanaga Volcano, the middle of three volcanoes on Tanaga Island, located about 1,250 miles southwest of Anchorage, the state's major population area. 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.Both Takawangha and Tanaga volcanoes in 2005 had smaller earthquake swarms that eventually just dissipated without an eruption -- at least none that officials know about.
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