A 7.4 magnitude earthquake strikes off the southern coasts of Chile and Argentina, the United States Geological Survey says.

A major, 7.4-magnitude earthquake struck in the South Atlantic Ocean on Friday, prompting an alert for a potential tsunami ...

A small tsunami has arrived in Antarctica, and residents of Southern Chile and Southern Argentina are evacuating.

RONALD J. DEIBERT is Professor of Political Science and Director of the Citizen Lab at the University of Toronto Munk School ...