A major earthquake off Alaska with a preliminary magnitude of 7.2 has prompted a tsunami advisory for the state's southern peninsula.The tsunami advisory was downgraded from an initial tsunami warning Wednesday afternoon after the earthquake struck about 50 miles south of Sand Point,

A tsunami advisory was lifted Wednesday afternoon for a portion of the Alaskan Peninsula coastline following a 7.3 magnitude earthquake that shook 50 miles off its coast, after the National Weather Service initially issued a tsunami warning,

An earthquake measuring magnitude 7.3 was recorded off the Alaska coast on Wednesday, July 16, according to the USGS.