TOKYO - 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.
Japan's Meteorological Agency raised the tsunami warning for the area of Honshu. But the U.S. Pacific Tsunami Warning Center did not post warnings for the rest of the Pacific.
The National Tsunami Warning Center says there is no tsunami danger for Hawaii, Alaska, British Columbia, Washington, Oregon and California following a powerful earthquake off Japan's east coast.
The center says the evaluation is based on information about the quake and historic tsunami records.
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