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Explained: Measuring earthquakes

The powerful earthquake that struck Japan in March was a 9.0-magnitude event. But this was not, as some people may assume, as registered on the Richter scale, the famed measuring system dating to the 1930s. Seismologists ...

dateMay 10, 2011 in Earth Sciences
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Haiti: Physics of Quakes Past, and Future

( -- The earthquake that struck Haiti took place along what is called a strike-slip fault -- a place where tectonic plates on each side of a fault line are moving horizontally in opposite directions, like hands ...

dateFeb 04, 2010 in Earth Sciences
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Conditions combined for devastating tsunami

(AP) -- Because of a lethal combination of geology and geography, the people of American Samoa didn't stand much of a chance. Almost every condition that triggers bad tsunamis was in place this time, generating waves that ...

dateSep 30, 2009 in Earth Sciences
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