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23 june 2011 - Earthquake off the coast of northeastern Japan

An earthquake with magnitude 6.7 occurred Thursday morning off the coast of northeastern Japan, triggering a brief tsunami warning in the region already devastated by a tidal wave on 11 March.

Japanese meteorological agency said the quake occurred at 06.51 am (00.51 GMT), about 50 kilometers off the Miyako (Iwate Prefecture), at a depth of 20 kilometers in the Pacific Ocean.

American Institute of Geological Survey recorded at 32 km depth hipocentrul.

Agency immediately issued a "warning" the tsunami of 50 centimeters high and Aomori Iwate Prefecture coast.

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About 8,000 people in Iwate were instructed to depart from the coast, NHK public television said.

But after having ascertained that there is no abnormal increase in coastal sea level, meteorological agency lifted the "warning" to less than one hour after the earthquake.

NHK said there were no reported casualties or damage.

Shinkansen high speed train traffic was temporarily suspended as a security measure.

Tsunami alert is triggered when there is risk of waves two meters, even three feet tall - high alert.

What happened on 11 March, when an earthquake of magnitude 9, the most violent ever recorded in Japan, caused a gigantic tsunami on the coast north-east of the archipelago, killing or disappearance of 23,000 people.

A wave height of 14 meters from the damaged reactor Fukushima Daiichi nuclear power plant, causing the worst nuclear accident at the Chernobyl catastrophe in 1986.

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