tremor

Japan warned of a heightened threat of a magnitude 8.0 earthquake or stronger after a powerful offshore jolt struck the country’s north, sending authorities scrambling to issue a tsunami alert. In a statement, the Japan Meteorological Agency (JMA) said that "the likelihood of a new, huge earthquake occurring is relatively higher than during normal times". The advisory for the northern region was issued hours after a 7.7-magnitude earthquake hit the area, shaking high-rise buildings in Tokyo, hundreds of kilometres from the…