Quake hits off Japan, sparks small tsunami

A strong and shallow earthquake has struck Japan’s northwest coast around Niigata prefecture, triggering a small tsunami, shaking buildings and cutting power to around 9000 buildings.

The magnitude 6.4 quake, according to the US Geological Survey, lasted as long as 20 seconds and caused damage including a landslide that struck a road, according to public broadcaster NHK.

There were no initial reports of fatalities or fires.


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Authorities lifted a 0.2-1 metre tsunami warning for the region after waves several centimetres high struck parts of the Niigata coast.

A tsunami of up to one metre could have caused some flooding and damage in low-lying coastal areas and river banks, though much of Japan’s coastline is guarded by sea walls.

Chief Cabinet Secretary Yoshihide Suga said authorities were on standby.

“We will work closely with local authorities to provide any disaster measures including lifesaving and rescue operations and have instructed officials to provide information in a timely and accurate manner,” he told a media briefing.

The quake struck at 10.22pm local time on Tuesday at a depth of 12km, the USGS said.

It measured 6.7 according to the Japan Meteorological Agency, and in some places was as high as a strong six on the agency’s seven-point “Shindo”, or Seismic Intensity Scale, which measures ground motion at specific points unlike magnitude which expresses the amount of energy released.

Tokyo Electric Power Co’s Kashiwazaki-Kariwa nuclear plant was not affected by the quake, which hit 85km northeast of the site. All of its seven reactors were already shut down, NHK said.

A Tepco spokesman said an initial inspection showed no damage to the plant, and inspectors would carry out more detailed checks.

The quake also temporarily halted express bullet train services in the region, with some roads also closed, according to NHK.

© AAP 2019

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