Tokyo: An earthquake with a preliminary magnitude of 7.6 struck northeastern Japan late Monday night, prompting the suspension of ocean discharge of nuclear-contaminated wastewater from the crippled Fukushima Daiichi Nuclear Power Plant.

The temblor occurred at 11:15 p.m. local time at a depth of 50 km, measuring upper 6 on Japan's seismic scale of 7 in the city of Hachinohe, Aomori Prefecture, triggering a tsunami warning for coastal areas of Aomori, Iwate and Hokkaido prefectures, said the Japan Meteorological Agency (JMA), Xinhua News Agency reported.

No abnormalities have been reported by nuclear plants in Hokkaido or in the northeastern prefectures of Aomori, Miyagi and Fukushima, public broadcaster NHK reported.

Tokyo Electric Power Company (TEPCO) said that the discharge of

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