8.2 Earthquake Off Alaska Prompts Tsunami Warning

An 8.2-magnitude earthquake off the coast of Alaska prompted a tsunami warning for parts of the state late Wednesday night.

An earthquake was detected about 75 miles southeast of Chignik, Alaska, said the National Weather Service, which issued the tsunami warning.

The warning was in effect for south Alaska and the Alaska Peninsula and the Aleutian Islands, said the Weather Service in Palmer, Alaska, which warned that “widespread hazardous tsunami waves are possible,” based on the preliminary parameters of the quake. A tsunami watch was also issued for Hawaii.

In Kodiak, where the earthquake could be felt, tsunami sirens blared and people began moving to higher ground.

Perryville, Alaska, with a population of 113, is 57 miles northwest of the quake’s epicenter, the United States Geological Survey said. Anchorage, with a population of nearly 300,000, was about 500 miles north northeast.

Since 1990, there have been 17 earthquakes of 8.2 magnitude or higher, according to U.S.G.S. data.

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