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23 March 2012 Last updated at 11:37 ET Help

Professor Kosuke Heki of Hokkaido University in Japan believes he has found a way to predict earthquakes.

Heki analyses GPS signals by measuring the TEC, or Total Electron Content, in the upper atmosphere. Whilst measuring how the TEC was disrupted by sound waves after the Tohoku earthquake of 2011, he discovered – quite by accident – that the TEC was also disrupted in the 40 or so minutes before it.

Going back through GPS records he has found similar correlations for other major earthquakes, a discovery that is being heralded as a major breakthrough in our understanding of earthquake phenomena.