A magnitude 6.1 quake struck off Aomori in northern Japan on Tuesday, the national weather agency said, but no tsunami warning was issued. The quake hit at 6:18 pm (0918 GMT) at a depth of 20 kilometres (12 miles), AFP reported citing Japan Meteorological Agency.
Major Japanese media outlets carried no immediate reports of damage or injuries.
The US Geological Survey put the magnitude of the quake at 6.2.
