Earlier on Tuesday, another quake of magnitude 6.7 hit northern Japanese coast some 83 kilometers (52 miles) to the northeast of the town of Miyako. Japan Meteorological Agency issued a warning tsunami advisory shortly after the quake due to possibility of strong currents, but lifted it later.
Japan is situated in a seismically active zone, with earthquakes of magnitude 6 and higher often taking place in the island nation.
In March 2011, the country saw a devastating 9 magnitude quake, which triggered a series of massive tsunami waves that led to a partial meltdown of several reactors at the Fukushima Daiichi nuclear power plant. The catastrophe left almost 16,000 people dead.
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