A tsunami advisory for Alaska's southern peninsula has been canceled, after a major earthquake with a preliminary magnitude of 7.3 initially prompted a tsunami warning earlier Wednesday.Videos posted to social media showed people in the town of Seward evacuating to higher ground after receiving a tsunami warning in the afternoon. "We're not expecting to see a large inundation of water coming up on shore. They may see small sea level changes, NWS Anchorage said.There was no danger to Anchorage, the state's most populous city.The quake was felt throughout the Alaska Peninsula and southern Alaska, the Alaska Earthquake Center said.Earlier in the day, a magnitude 5.2 earthquake also struck the region. It was located approximately 40 miles southeast of Atka Island, the earthquake center said.Alaska's southern coast is situated along the seismically active Pacific "Ring of Fire." The strongest earthquake ever recorded in North America occurred there in March 1964, when a 9.2-magnitude earthquake devastated Anchorage and unleashed a tsunami that killed more than 250 people.