Technology
Big quakes don't set off others far away: study
March 28, 2011
NEW YORK (AP) -- Here's some good news in the wake of Japan's isaster: A new study says big earthquakes don't set off other dangerous ones around the globe.Big quakes do trigger local aftershocks, but researchers found no sign of setting off moderate-sized events beyond about 600 miles (1,000 kilometers) away.That won't surprise most experts, said lead study author Tom Parsons. But it's different from his prior research, which did find a global effect for setting off small quakes, said Parsons,