Tuesday, January 22, 2013

When the Chilean earthquake occurred in 1960, seismographs recorded seismic waves that traveled all around the Earth. These seismic waves shook the entire earth for many days! This phenomenon is called the free oscillation of the Earth.

Posted by Zoran Ignjatovic | Permalink |  

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2 comments:

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September 16, 2013 at 6:25 PM  

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June 27, 2014 at 6:39 PM  

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