Japan quake moved sea bed 24 metres: Coastguard

Undersea movement is more than four times bigger than any observed on land.

Tokyo: The seabed near the epicentre of the
massive earthquake that rocked Japan last month was shifted 24
metres by the tremor, the country`s coastguard said on Wednesday.

Sensors found that one part of the ocean floor had been
stretched to a point 24 metres east-southeast of its position
before the 9.0 undersea quake, which triggered a massive
tsunami that engulfed large areas of Japan`s northeast coast.

The undersea movement is more than four times bigger than
any observed on land, where part of the Oshika peninsula in
Miyagi prefecture was found to have shifted 5.3 metres.

The US Geological Survey (USGS) said in March that the
force of the quake moved Honshu -- Japan`s main island -- by
2.4 metres.

Bureau Report

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