A major earthquake with a preliminary magnitude of 7.2 initially triggered a tsunami warning, later downgraded to an advisory, for the southern Alaska Peninsula.

A lightly populated stretch of Alaska’s southern coast was under a tsunami warning Wednesday after a strong earthquake was felt throughout the region, and officials in the Pacific Northwest were evaluating whether there was any threat to coastlines there.

The warning includes the southern end of the Alaska Peninsula, along the coast, and up to both sides of Cook Inlet.