A magnitude-6.6 earthquake struck at 6:09 p.m. Hawaii time near the east coast of Kamchatka, Russia, the U.S. Geological Survey reported.
The Pacific Tsunami Warning Center says the quake did not generate a Pacific-wide tsunami, and there is no threat to Hawaii from a tsunami. The warning center set the magnitude at 6.9.
The quake was 6 miles deep, and just inland of the east coast.
It was followed by a magnitude-4.6 aftershock.
The area is one of the most seismic regions in Russia, the USGS says.