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October 16, 2012

FOR KIDS: Earth’s big breakup

In April, a powerful earthquake shook Sumatra, an island in the Indian Ocean that’s part of the country of Indonesia. Two hours later, a second earthquake — one nearly as powerful — hit the same region. This one-two punch had a big reach: It set off additional quakes as far away as Mexico.

The Sumatra earthquakes occurred near where a 2004 earthquake struck and caused a tsunami that killed hundreds of thousands of people. Big quakes also hit the area in 2005 and 2007. Scientists now suspect that all of the earthquakes there don’t only add up to a lot of shaking — those powerful tremors also indicate something may be changing deep underground.

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