A strong earthquake has struck the northern Japanese island of Hokkaido, according to US and Japanese monitoring agencies, the latest in a series of tremors affecting the country. The quake, with a magnitude of 6.2, occurred at 05:23 local time on Monday, the Japan Meteorological Agency (JMA) said, revising an earlier estimate of 6.1. It struck at a depth of 83km (52 miles) in southern Hokkaido.
