A magnitude-6.8 earthquake struck near the east coast of Japan's Honshu island in the Pacific Ocean, the U.S. Geological Survey reported.

The temblor, one in a series of earthquakes to rattle the country, hit at 1:45 a.m. local time on Thursday and was felt as far away as Tokyo, about 100 miles from the epicenter.

National television and police said no injuries or damage had been reported in Tokyo and no tsunami warning issued.

Japan is one of the world's most earthquake-prone countries because it sits atop four tectonic plates.