Powerful 6.8-magnitude earthquake rattles Japan AFP/Tokyo The quake hit at a depth of 47 kilometres in the Pacific. A 6.8-magnitude earthquake struck off Japan’s northeastern coast on Saturday, authorities said, but no tsunami warning was issued and there were no immediate reports of damage. The United States Geological Survey (USGS) said the mid-morning quake hit at a depth of 47 kilometres (29 miles) in the Pacific, off Ishinomaki in Miyagi prefecture — near the epicentre of a huge 2011 quake which triggered a towering tsunami, killing more than 18,000 people. Japan’s meteorological agency said there was no tsunami risk following Saturday’s jolt, which produced strong shaking along parts of the eastern coast and was also felt in Tokyo.