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The quake briefly triggered tsunami alerts at nearby coastlines, less than two months after a larger earthquake sent tsunami waves across the Pacific.

By John Yoon

A magnitude 7.4 earthquake struck the Russian Far East on Saturday, the U.S. Geological Survey said, prompting a brief alert by the authorities that tsunami waves were possible at the Kamchatka Peninsula.

The quake hit off the east coast of the peninsula at around 2:40 p.m. local time, the U.S.G.S. said. It was at a depth of about 25 miles, which is considered shallow, meaning it could be destructive.