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The United States Geological Survey says quake with a preliminary magnitude of 6.2 struck just after 1:30 a.m., more than 170 miles (264 kilometers) west of Coos Bay, about 220 miles southwest of Portland.
Robert Sanders of the USGS says there is no tsunami threat associated with the quake. He says people as far away as Portland reported feeling the temblor.
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Dispatch with the Coos Bay police says there have been no reports of damage or injury.
The quake was located at a depth of about 6 miles (10 kilometers).
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