The 2011 earthquake off the Pacific coast of Tohoku, also known as the 2011 Tōhoku earthquake had a magnitude 9.0 with the epicenter approximately 70 kilometres east of the Oshika Peninsula of Tōhoku and the hypocenter at an underwater depth of approximately 32 km. It was the most powerful known earthquake ever to have hit Japan, and one of the five most powerful earthquakes in the world overall since modern record-keeping began in 1900.
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