Chile's National Emergency Office (Onemi) said there need for urging evacuation from "the beach area of the Antarctic" ahead of a possible tsunami. The Chilean air force's base is the country's largest in Antarctica and includes a village, hospital, school, bank, post office and chapel.
The maximum population in summer is 150 people, and the average population in winter is 80.
An unrelated 5.9-magnitude earthquake struck near Santiago on previous day but no significant damage or impact was reported. Chile is one of the most seismically active countries in the world. The country suffered the most powerful earthquake ever recorded 60 years ago — measuring 9.6 magnitudes — in Valdivia.
Authorities in Chile say they regret spreading panic with a mistaken tsunami warning calling for people to get out of coastal areas following an earthquake in Antarctica. He said the agency regretted the inconvenience caused by its messages, which he blamed on a technical error. The tsunami warning for Antarctica was later lifted.