<span style="color: #222222;">In Japan, a 6.3-magnitude earthquake has hit off Fukushima. Tremors were also felt in the national capital Tokyo, around 250 KMs away. However, the authorities said, there was no tsunami threat.<br />'' <br />'' The Japan Meteorological Agency said, the epicentre of the earthquake, which struck at 7.23 pm local time, was off the coast of Fukushima prefecture and measured at a depth of 50km.<br />'' <br />'' Japanese authorities said that there were no immediate reports of injuries or damage. Bullet train services were temporarily suspended in the region.<br />'' <br />'' The nuclear plants in the region were reported to be unaffected by the earthquake. In 2011, a massive 9.0-magnitude earthquake and tsunami triggered a nuclear accident in Fukushima. <br />'' <br />''<br />''Earthquakes are common in Japan, one of the world's most seismically active areas. Japan accounts for about 20 per cent of the world's earthquakes of magnitude 6 or greater. </span>