According to the U.S. Geological Survey, the quake was centered some 550 miles northwest of Vancouver, British Columbia. The quake was followed by a 5.8 aftershock. There were no reports of injuries or damage Saturday night.
A tsunami warning was issued for all Hawaiian Islands just after 7 p.m. PT following the quake. It was issued after buoy readings indicated that Hawaii could be impacted. Waves were predicted to hit the islands by 1:30 a.m. PT Sunday.
A tsunami advisory was also issued for coastal British Columbia, southern Alaska, Northern California, Oregon and Washington state. A tsunami warning indicates an area is likely to be hit by a wave, while an advisory means an area could be hit.
A small tsunami created by the magnitude-7.7 quake was barely noticeable in Craig, Alaska, where the first wave or surge was recorded Saturday night at 4 inches, much smaller than predicted.
People on Twitter reported feeling the quake as far as Seattle.
The Associated Press contributed to this report.