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1 August 2011
Measuring tsunami remnants half a world away
By the time the waves of the 2004 Sumatra tsunami swept half way across the globe and reached Drake Passage at the Southern tip of South America, they were just ripples.
But two pressure gauges deep below the surface of the passage reacted to those tiny remnants of the once-towering waves, giving scientists a fortuitous opportunity to study the long-distance behavior of a tsunami.