A powerful earthquake struck off the northern Japanese coast Monday, prompting the Japan Meteorological Agency (JMA) to issue a tsunami alert for a wide section of coastline, though waves of only abou...

A 7.7 magnitude earthquake occurred off Sanriku, off Japan's northeast coast, at 16:52 (08:52 BST) local time and had a depth of 19km (11.8 miles).

The warning for the northern region came a few hours after a 7.7-magnitude earthquake struck the area, shaking large buildings in the capital Tokyo - hundreds of kilometres from the epicentre.