A seismic wave travelled inside Earth, bounced back and slammed into the faults that were already shaking from the 9-magnitude earthquake. This triggered portions of Japan to shift from their place permanently, scientists say. The Tōhoku earthquake that struck off the coast of Japan in 2011 significantly shifted some parts of the country from their current place, a study has found. This is the first time that an earthquake jolted a country into changing its position. A new... [2637 chars]