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Strong Earthquake Rocks South Atlantic

A major earthquake jolted a largely empty area of the southern Atlantic Ocean Monday morning, between Antarctica and Argentina.

Seismologists around the world are on alert, but there is no sign of any tsunami triggered by the earthquake, which was measured at a magnitude of at least 7.3.

The U.S. National Earthquake Information Center says the earthquake was centered about 10 kilometers below the ocean floor, nearly 350 kilometers southeast of the South Sandwich Islands. It hit shortly after six hours, Universal Time.

Scientists in Japan and Finland said they measured the quake's strength at magnitude 7.5 and 7.4, respectively.

Britain administers the South Sandwich Islands, an uninhabited chain roughly 4,000 kilometers southeast of Buenos Aires. Argentina also claims the islands.

Some information for this report provided by AP, AFP and Reuters.