A Saturday night earthquake off the Alaska coast set off local emergency warnings and a brief tsunami warning, sending some residents of some coastal communities preparing for possible evacuations.

 The magnitude 7.2 quake centered 65 miles south of Sand Point, Alaska, was felt widely throughout the Aleutian Islands, the Alaskan Peninsula, and Cook Inlet regions, according to the Alaska Earthquake Center at the University of Alaska Fairbanks.

The quake was detected at 10:48 p.m. Saturday, and initially was reported as 7.4 magnitude but downgraded to 7.2 soon after.

The U.S. National Weather Service sent a tsunami advisory saying the quake occurred at a depth of 13 miles (21 kilometers). The advisory was cancelled about an hour later.

Bristol Bay was not affected, but a tsunami warning was issued for Kodiak Island, and the Alaska Peninsula including Chignik area communities, public radio station KDLG in Dillingham reported.

Sirens sounded in local communities, including Sand Point, Chignik area and Kodiak, with officials urging residents to seek higher ground. The tsunami warning was later downgraded to an advisory and was canceled altogether by 1 a.m. Sunday.

Before the cancellation, the National Weather Service in Anchorage, Alaska, advised on its Twitter account that the tsunami advisory applied to coastal Alaska from Chignik Bay to Unimak Pass, but Kodiak Island and the Kenai Peninsula were not expected to be impacted.

Shortly after the Alaska tsunami warning, the Hawaii Emergency Management Agency said there was no threat to the islands.

Have you listened to this article via the audio player above?

If so, send us your feedback around what we can do to improve this feature or further develop it. If not, check it out and let us know what you think via email or on social media.

Join the Conversation