This “extraordinary” event was likely caused by seismic waves bouncing off Earth’s core, researchers found

An extremely unusual tectonic movement took place 15 minutes after the Tohoku earthquake in 2011, causing almost the whole of Japan to move 5 millimetres to the east

When the magnitude 9.0 Tōhoku earthquake struck off the coast of Japan in 2011, its seismic shivers did more than ripple through the planet.

This “extraordinary” event was likely caused by seismic waves bouncing off Earth’s core, researchers found