Tokyo: Several strong earthquakes shook northeastern parts of Japan on Wednesday morning, days after a devastaing 8.9 magnitude earthquake-cum-tsunami rocked the country on March 11, the Japan Meteorological Agency has said.

The Kyodo news agency quoted the Nuclear and Industrial Safety Agency as saying that the latest quake, which is believed to be the aftershock of the previous cathestrophic one, did not affect the already troubled Fukushima Daiichi and Daini nuclear power plants, and the ongoing reconstruction work there.

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