A powerful offshore earthquake Wednesday triggered a tsunami warning on a stretch of Alaskan coastline - which was then soon after canceled.

A magnitude 7.3 earthquake struck Wednesday afternoon just south of the northern Aleutian Islands in Alaska. The epicenter was roughly 600 miles southwest of Anchorage, Alaska. A tsunami warning was in effect for less than an hour, but has since expired with little signs of damage.

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The Pacific Tsunami Warning Centre has issued a warning for Russia's Kamchatka Peninsula after two quakes — the larger with a magnitude of 7.4 — struck in the sea nearby on Sunday. The larger quake was at a depth of 20 kilometers and was 144 kilometers east of the city of Petropavlovsk-Kamchatsky, which has a population of 180,000.