TOKYO - A strong earthquake shook northern Japan Tuesday morning and the country's Meteorological Agency issued tsunami warnings.
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The magnitude 6.9 quake struck at 6:39 a.m. (4:39 p.m. Monday EST), the agency said. The U.S. Geological Survey put the magnitude at 7.2. There was no immediate explanation for the discrepancy. The quake hit at a depth of about 15 miles and was centered off the coast of Sanriku in northern Japan, 330 miles east of Tokyo, the USGS said.
The agency said a tsunami could reach Japan's Pacific coastlines between 7:10 a.m. and 7:30 a.m. (5:10 p.m. and 5:30 p.m. EST Monday) in Iwate, Miyagi, Fukushima and Hokkaido, the agency said.
The agency said the tsunami could be as high as 20 inches. Such waves are often barely noticeable in the ocean but can rise to greater heights once they arrive at shore.
There were no immediate reports of injuries, according to national broadcaster NHK.
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