The quake, only 20.5 miles deep, struck at 2204 GMT 31 miles southeast of Nikolski, on Umnak island.
WASHINGTON (Reuters) - A powerful magnitude 6.5 quake hit off Alaska's Aleutian Islands on Wednesday, the U.S. Geological Survey said, but it did not immediately trigger a tsunami warning.
The quake, only 20.5 miles deep, struck at 2204 GMT 31 miles southeast of Nikolski, on Umnak island.
The Pacific Tsunami Warning Center did not immediately issue a tsunami warning.
(Reporting by Sandra Maler, Editing by Howard Goller)
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