Seismic Wave from Japan's 2011 Earthquake Bounced Off Earth's Core and Shifted the Entire Country
A seismic wave from Japan's devastating 2011 earthquake traveled to Earth's core, bounced back, and caused the entire nation to shift eastward by five millimetres—an unprecedented discovery by researchers analysing GPS data from across the country. The phenomenon occurred approximately fifteen minutes after the initial magnitude-9 tremor struck off the coast, making it the first documented case of a deep-Earth reflected seismic wave producing measurable ground displacement over such an enormous …









