An 8.2-magnitude earthquake has been detected about 175 miles southeast of Kodiak, Alaska, in the Gulf of Alaska, according to preliminary figures from the United States Geological Survey.
The quake had a depth of about 6 miles, according to USGS.
A tsunami warning is in effect for southeast and south Alaska, including the Alaska peninsula, Aleutian islands and British Columbia in Canada. A tsunami watch is in effect for California, Oregon and Washington, according to the Tsunami Warning Center.