TOKYO >> A powerful 7.6-magnitude earthquake shook northeastern Japan late today, prompting tsunami warnings and orders for about 90,000 residents to evacuate.

The Pacific Tsunami Warning Center on Oahu said there was no tsunami threat to Hawaii but the Japan Meteorological Agency said a tsunami as high as 10 feet could hit Japan’s northeastern coast after the earthquake struck off the coast at 11:15 p.m. (4:15 a.m. in Hawaii.)

Tsunami warnings were issued for the prefectures of Hokkaido, Aomori and Iwate, and tsunamis from 7 to 27 inches high were observed at several ports, JMA said.

The epicenter of the quake was 50 miles off the coast of Aomori prefecture, at a depth of 31 miles, the agency added.

On Japan’s 1-7 scale of seismic intensity, the tremor registered as an “upper 6” in Ao

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