<div id="subtitle">A 6.3 temblor shakes the ocean floor near Antarctica _ and only seismologists notice</div><div><p>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.</p><p>The U.S. Geological Survey says the quake hit at 8 a.m. (1200 GMT) Sunday in Drake Passage, about 220 miles (354 kilometers) southeast of Ushuaia, Argentina, at a depth of 13 miles (21 kilometers).</p><p>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.</p><p>Seas were calm at South America's southern tip, and no tsunami warnings were issued.</p><img src="http://admatch-syndication.mochila.com/images/ad.gif?aid=67101792&bid=informcom" /></div><div id="copyright"><div>

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