A 6.1 magnitude earthquake hit northern Japan, with no immediate reports of damage or casualties.

A preliminary magnitude 6.1 earthquake struck northern Japan early Monday, the U.S. Geological Survey reported, but there were no immediate reports of fatalities or damage.

A magnitude 6.2 earthquake shook part of northern Japan early Monday, but no damage or casualties have been reported. No tsunami advisory was issued by the Japan Meteorological Agency. The quake struck 18 kilometers west of the small town of Sarabetsu on Japan's northernmost main island of Hokkaido at a…