Tsunami warnings issued for Hokkaido, Aomori, and Iwate prefectures
No irregularities at nuclear plants, but power outages reported
Yen weakens against major currencies after quake news
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TOKYO, Dec 8 (Reuters) - A powerful 7.6-magnitude earthquake shook northeastern Japan late on Monday, prompting tsunami warnings and orders for about 90,000 residents to evacuate.
The Japan Meteorological Agency said a tsunami as high as 3 metres (10 feet) could hit Japan's northeastern coast after the earthquake struck off the coast at 11:15 p.m. (1415 GMT)."