An earthquake of magnitude 7.3 struck Saturday morning off Japan's east coast, near the crippled Fukushima nuclear site, the U.S. Geological Survey said. Japan's emergency agencies declared a tsunami warning for the area.
The quake hit at 3:10 a.m. Saturday Tokyo time (1310 GMT), the USGS said.
The tremor was felt in Tokyo, some 300 miles (480 kilometers) away.
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