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What Is An Earthquake? | The Dr. Binocs Show | Educational Videos For Kids
a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's cru...
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Richter scale . The Richter magnitude scale was developed in 1935 by Charles F. Richter of the California Institute of Technolo...
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a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's cru...
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OFFICIAL RESCUE TEAMS from the U.S. and other countries who have searched for trapped people in collapsed structures around the world, as...
