If Alaskans weren’t jolted awake by the magnitude 7.9 earthquake of their coast this morning, the ensuing tsunami warning sirens likely stirred them.

Early this morning, a tsunami warning was issued and within three hours cancelled for the west part of Canada and coastal Alaska. Anyone in the vicinity is advised to move inland, find higher ground, and help others who may not be able to escape unaided.

A tsunami watch was also in effect for Washington, Oregon, and California. The warning was prompted after a large 7.9 magnitude earthquake was detected in the Gulf of Alaska in the early morning hours.

Both Canada and U.S. agencies are sending out emergency alerts via Twitter.

The USGS is estimating