Satellite images of the north-east coast of Japan before (left) and after the earthquake and tsunami. Water is black or dark blue and the thin green line in the 'after' image indicates the shoreline. Photograph: Nasa
The magnitude 8.8 earthquake that jolted northeast Japan was caused by a tectonic upheaval that created offshore faults stretching for hundreds of kilometers from Iwate Prefecture to Ibaraki, The Japan Times and the London Evening Standard reported seismologists saying Saturday.
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