A powerful 6.0-magnitude tremor has stuck near the eastern coast of Japan's Honshu Island.

The US Geological Survey website says the earthquake occurred at 10:12 am GMT on Saturday at a depth of 38.9km, 160km east of the city of Morioka. There have been no immediate reports of damage or casualties. The latest tremor comes along the series of aftershocks that followed the March 11 mega earthquake and ensuing tsunami that devastated Japan's northeast.