7.3-magnitude quake strikes off Japan

By Alex Zolbert and Jethro Mullen, CNN

updated 7:37 AM EST, Fri December 7, 2012

STORY HIGHLIGHTS

• NEW: Only minor injuries were reported
• A one-meter tsunami comes ashore in the northeast prefecture of Miyagi
• There is no threat of a widespread tsunami in the Pacific, a warning center says
• The 7.3-magnitude quake shook buildings in Tokyo

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Tokyo (CNN) -- A powerful earthquake struck off the northeast coast of Japan on Friday evening, rattling buildings in Tokyo and setting off a small tsunami.

It also jarred nerves in a nation still recovering from the devastating earthquake and tsunami in March 2011 that killed thousands of people and triggered the world's worst nuclear crisis in a quarter century.

Some roads were closed and rail services suspended in the northeastern prefecture of Miyagi, where a one-meter (3-foot) tsunami rolled ashore. It was followed by four other waves ranging from eight to 16 inches. Only minor injuries were reported immediately, including five in Miyagi and five on the outskirts of Tokyo.

Miyagi was one of the areas that suffered the worst of the destruction from the 9.0-magnitude quake and resulting tsunami in 2011.

The weaker, 7.3-magnitude quake on Friday took place further out at sea -- 462 kilometers (287 miles) east-northeast of Tokyo at a depth of 36 kilometers (22 miles) -- the U.S. Geological Survey said, slightly revising the initial location it gave.

It didn't create a widespread threat of a tsunami in the Pacific, according to the Pacific Tsunami Warning Center.

The massive earthquake and tsunami in 2011 killed more than 15,000 people in Japan. It caused the formation of 30-foot walls of water that swept away rice fields, engulfed entire towns, and tossed houses and cars onto highways.

The combined natural disasters did severe damage to the Fukushima Daiichi nuclear power plant, setting off meltdowns at reactors at the facility that contaminated a large area. No damage was reported at the country's nuclear power facilities after Friday's quake.

Radiation levels in fish caught near the area remain high long after the 2011 meltdowns, suggesting contamination from the site might still be seeping into Pacific waters, a U.S. researcher said in October.

Radioactive levels staying high off Fukushima

CNN's Alex Zolbert reported from Tokyo, and Jethro Mullen from Hong Kong. CNN's Junko Ogura in Tokyo and Elizabeth Joseph in Hong Kong contributed to this report.

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