TOKYO - An earthquake with a preliminary magnitude of 5.9 hit eastern Japan early Sunday, leaving over 40 people injured in Tokyo and neighboring prefectures, authorities said, prompting a warning by the weather agency about similar quakes in the coming days.

The 2:00 a.m. quake, which originated in the southern part of Ibaraki Prefecture at a depth of 68 kilometers, did not trigger a tsunami, the Japan Meteorological Agency said. It had issued an emergency earthquake alert.

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