TOKYO – A tsunami warning has now been lifted following an earlier warning following a strong earthquake on Monday off the coast of Japan’s Miyazaki prefecture, officials said.

The US Geological Survey put the preliminary magnitude of the quake at 6.8. The Japan Meteorological Agency said the intensity was below 5 on Japan’s 0 to 7 scale.

The quake began around 9:19 p.m. local time and its epicenter was a few miles offshore at a depth of about 30 km, Japanese and American officials said.

The Japan Meteorological Agency had issued a tsunami warning for Miyazaki and Kochi prefectures, with heights expected to be around one meter. A tsunami wave measuring about 20 centimeters reached some coasts and ports around 10 p.m., authorities said. They warned residents to continue to stay away from the coast and other waterways.

In Kochi Prefecture, residents of some areas have been advised to evacuate.

Japanese weather authorities said about an hour after the quake that they were still gathering information about disturbances. Some trains were suspended and it was unclear when they would resume.

Authorities warned that aftershocks and other tremors could still occur, so residents should stay in a safe place. Residents were warned to be careful of broken glass and other debris.

Significant damage has not been reported and there have been no abnormalities in radiation levels or the operation of regional nuclear power plants, officials said.

ABC News’ Joe Simonetti contributed to this report.