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Earthshaking Event

Lessons from the temblor that produced tsunamis and other global effects

Dec. 26, 2004 dawned calm in Southeast Asia, but things didn't stay that way for long. At 7:59 a.m. local time, deep beneath the seafloor west of Sumatra, two of Earth's tectonic plates began to slip past one another, releasing stress that had built up between the overlapping slabs for decades. An earthquake, the largest anywhere on Earth in more than 40 years, had begun.

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