It also moved Japan's coastline, the U.S. Geological Survey said.
The redistribution of mass caused by the quake tilted the Earth's axis 6.5 inches and shortened the day by a 1.8 millionths of a second, the NASA Jet Propulsion Laboratory said.
It also made Japan about 13 feet wider than it was before, the geological survey said.
In addition, a 250-mile-long coastal section of Japan dropped in altitude by 2 feet, which let the tsunami travel farther and faster onto land, geological survey geophysicist Ross Stein was quoted by The New York Times as saying.
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