RELATED: Quake Tracker
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.
VIDEO: Bay Area's most dangerous fault is a 'tectonic time bomb'
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).
Click here for more stories, pictures and videos on earthquakes
VIDEO: What to pack in your earthquake emergency kit
What to pack in your earthquake emergency kit