ANKARA

A 6.2 magnitude earthquake struck off Japan's northern island of Hokkaido on Sunday, the country's weather agency said.

No tsunami warning has yet been issued, the Tokyo-based Kyodo News reported.

The quake registered at a lower 5 on Japan's national seismic intensity scale of seven in southern parts of the prefecture at around 6.55 p.m. local time (0955GMT), the Japan Meteorological Agency said.

There were no immediate reports of casualties due to the tremors, which occurred at a depth of 140 kilometers (87 miles) in waters off Urakawa, an area in southern Hokkaido.

The tremors also jolted a large region in northeastern Japan.

Nuclear facilities in the affected areas, including the Tomari nuclear power plant in Hokkaido and nuclear fuel cycle facilities in Aomori Prefecture, remain secure with no abnormalities detected, officials said.

Train operations were suspended on some local lines, while subway train schedules were also disrupted in the city of Sapporo.

Bullet trains on the Hokkaido, Tohoku, Joetsu, and Hokuriku Shinkansen lines continued to operate as normal.