A powerful 7.3 magnitude earthquake has hit the Pacific island nation of Vanuatu, causing damage to buildings and infrastructure, and generating aftershocks ranging from 4.7 to 5.5 in magnitude. The quake triggered a tsunami alert for parts of the country, but officials later confirmed that the threat had passed. There are unconfirmed reports of at least one death, and many people have been injured. The extent of the damage remains unclear, but it is expected to be significant given the size and depth of the quake. The US embassy in Port Vila has sustained considerable damage and will be closed until further notice.