The earthquake that launched a series of disasters in Japan in March triggered micro-quakes and tremors around the world, scientists find. The catastrophic magnitude 9.0 earthquake that struck off the coast of the Tohoku region of Japan March 11 set off tremors mostly in places of past seismic activity, including southwest Japan, Taiwan, the Aleutians and mainland Alaska, Vancouver Island in Canada, Washington state, Oregon, central California and the central United States. It was unlikely that any of these events exceeded magnitude 3....
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