An earthquake with a preliminary magnitude of 6.0 struck Fukushima and other prefectures in Japan's east and northeast on Sunday, but there was no threat of a tsunami, the Meteorological Agency said.

There were no immediate reports of injuries or serious property damage following the quake, which occurred around 12:24 p.m.

The quake's magnitude was later revised upward from the initial estimate of 5.8, the agency said.

The quake registered lower 5 on the Japanese seismic intensity scale to 7 in the city of Iwaki in Fukushima, according to the agency. Its focus was at a depth of about 30 kilometers in the Pacific off Ibaraki Prefecture.

The quake registered 4 in some other parts of Fukushima and 3 in the neighboring prefectures of Miyagi, Yamagata, Ibaraki, Niigata and Tochigi.

No abnormalities were found at the Tokai No. 2 nuclear power plant on the coast of Ibaraki or at the Fukushima No. 1 and No. 2 nuclear power plants, their operators said.

There were also no major transport disruptions. JR East said it briefly suspended services on a section of the Tohoku Shinkansen line between Fukushima and Miyagi prefectures.

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