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WHEN THE EARTH SHAKES

By unknown | 2009-12-03 00:00:00.0

EARTHQUAKES occur when the earth's crust suddenly moves along a fault. Most quakes are so slight that they are not felt by humans.

EARTHQUAKES occur when the earth's crust suddenly moves along a fault. Most quakes are so slight that they are not felt by humans.

Some quakes create vibrations similar to those caused by the passing of a large truck. But vibrations of big earthquakes can be extremely destructive; they can destroy entire cities in seconds. - sciencekids.co.nz; pacificislandtravel.com; wikipedia.org

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