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Sendai 2011
According to Italy’s National Institute of Geophysics and Volcanology, the earthquake’s enormous strength shifted the Earth’s axis by 25 centimeters (9.8 in). This deviation led to a number of small planetary changes, including the length of a day and the tilt of the Earth. The speed of the Earth’s rotation increased, shortening the day by 1.8 microseconds due to the redistribution of Earth’s mass.
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