The Pacific Tsunami Warning Center on Oahu has confirmed that there is no tsunami threat from a 6,8 magnitude earthquake off Japan.

The quake hit at 2:28 p.m. Sunday near the epicenter (7:28 p.m. Saturday Hawaii time) under the sea several hundred miles southeast of Honshu, Japan, shaking buildings in the capital.

The quake, which struck near the uninhabited island of Torishima in the Pacific Ocean, was centered about 307 miles south-southwest of Tokyo, and about 216 miles below the sea, the U.S. Geological Survey said.

Buildings in the Tokyo area shook, but no damage or injuries were reported. Express trains in northern and central Japan were suspended temporarily for safety checks but later resumed.

No abnormalities were reported at power plants, including the crippled nuclear power plant in northeast Japan hit by the March earthquake and tsunami, public broadcaster NHK reported.

A massive earthquake and tsunami March 11 left nearly 20,000 people dead or missing. Japan, which lies along the Pacific "Ring of Fire," is one of the world’s most seismically active countries.