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A seismic wave from Japan’s 2011 magnitude-9 earthquake travelled nearly 2,900 kilometres down to Earth’s core, bounced back to the surface 13 minutes later, and shifted the entire country eastward by roughly six millimetres at the same instant — in the first
A seismic wave from Japan’s 2011 magnitude-9 quake traveled nearly 2,900 km to Earth’s core and back, shifting Japan eastward by 6 mm. New findings reveal Earth’s internal response.
