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On March 11, 2011, at 05:46:23 UTC, a megaearthquake (magnitude 9.0) occurred near the NE coast of Honshu Island (Japan), which originated near the subduction plate boundary between the Pacific and North American plates. The epicenter has been located at about 130 km east of Sendai City at a depth of about 32 km. A foreshock sequence took place days preceding the mainshock with magnitude 7.3 in March...
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