Earthquake monitors say a 6.3 magnitude temblor has shaken the ocean floor between South America and Antarctica, too deep and far from land to cause any damage.

The U.S. Geological Survey says the quake hit at 8 a.m. Sunday in Drake Passage, about 220 miles southeast of Ushuaia, Argentina, at a depth of 13 miles.

Firefighter chief Carlos Arimendi says they didn't feel it Argentina's southernmost city. Chilean seismologists said it had no impact in Puerto Williams, a Chilean outpost across the Beagle Channel from Ushuaia.

Seas were calm at South America's southern tip, and no tsunami warnings were issued.