A 7.7 magnitude earthquake in Canada triggered a tsunami that hit the Hawaii island chain.
There are no reports of major damage and waves have been smaller than expected.
Initially, residents of low-lying areas of the Pacific Island were ordered to evacuate to higher ground, as seismologists predicted waves of three to six feet.
But only one area, Kahului Harbor, saw anything approaching that with waves of 2.5 ft (76 cm). However, surges could continue for several hours.
The quake hit the western coast of Canada at 3:00 GMT and was followed by a 5.8 magnitude aftershock. There are no reports of damage or casualties and tsunami warnings for Alaska and British Columbia have been downgraded.