July 24 (Bloomberg) -- At least 65 people were injured when a magnitude-6.8 earthquake struck northern Japan today, the country's Fire and Disaster Management Agency said. No fatalities were reported and there was no threat of a tsunami.

The temblor struck Honshu island at 12:26 a.m. local time at a depth of 108 kilometers (67 miles), the agency said. The quake took place about 75 kilometers south of Hachinohe, according to an advisory by the U.S. Geological Survey on its Web site. Buildings shook in Tokyo 485 kilometers to the south.

At least 102 people may have been injured, 9 of them critically, public broadcaster NHK reported.

The central government has established an office to deal with the effects of the quake, and a survey team headed by Shinya Izumi, the minister in charge of natural disaster measures, will head to the affected areas to evaluate the damage, Kyodo News reported.

Train services on the Akita and Tohoku high-speed lines running through the area have been suspended until about noon, Kyodo News said, citing operator East Japan Railway Co.

The Onagawa nuclear power plant in Miyagi prefecture and the Higashidori plant were operating normally, Kyodo said, citing Tohoku Electric Power Co.

Japan, which experiences about 20 percent of the world's earthquakes annually, lies in a zone where the Eurasian, Pacific, Philippine and North American tectonic plates meet and occasionally shift, causing quakes.

At least 12 people died last month after a 6.8-magnitude earthquake hit in Japan's north.

To contact the reporter on this story: Taku Kato in Tokyo at tkato6@bloomberg.net

Last Updated: July 23, 2008 17:21 EDT