The 7.5-magnitude temblor struck off the coast of Alaska at 3:58 a.m. ET, CNN reported.
The U.S. Geological Service initially measured the quake at 7.7-magnitude.
The earthquake was centered 63 miles west of Craig, on Prince of Wales Island, and 208 miles south of Juneau, USGS reported.
The warning was canceled after a small tsunami of about 6 inches was seen near Port Alexander in southeastern Alaska.