ＺT Tsunami warning in effect after magnitude-7.9 earthquake off

(CNN)A magnitude-7.9 earthquake detected in the Gulf of Alaska has triggered tsunami warnings in Alaska and tsunami watches across several Western states.

A tsunami warning is in effect for southeast and south Alaska, including the Alaska Peninsula and Aleutian Islands, as well as British Columbia in Canada. A tsunami watch is in effect for California, Oregon and Washington, according to the Tsunami Warning Center.

As of 2:29 a.m. (6:29 a.m. ET), water in the harbor near Kodiak was receding, the city's police department tweeted, after earlier urging residents to get at least 100 feet above sea level.