The powerful earthquake that struck northeastern Japan and caused tsunami in late November may have been caused by a slip in a zone that may be an extension of two known active faults under the seabed off the crippled Fukushima nuclear power plant site, according to a new analysis.
Shinji Toda, a professor at Tohoku University who compiled the analysis with a colleague, warned that the suspected extension of the two faults could cause an earthquake in the future and trigger tsunami if blocks of the seafloor shift vertically along either fault.
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