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Minor tsunami hits Japan after undersea quake

17 february 2015, 14:14
0
An earthquake expert from Japan's Meteorological Agency, Yasuhiro Yoshida, speaks at a press conference at their headquarters in Tokyo. ©AFP
An earthquake expert from Japan's Meteorological Agency, Yasuhiro Yoshida, speaks at a press conference at their headquarters in Tokyo. ©AFP

 A strong undersea earthquake unleashed a small tsunami Tuesday off the same coastline of northern Japan devastated by a tsunami in 2011 that left more than 18,000 people dead, AFP reports.

The quake was followed by a series of tremors, the largest of which was magnitude 5.8, but there were no immediate reports of damage or casualties.

A wave of 20 centimetres (eight inches) was recorded off the city of Kuji at 9:07 am (0007 GMT), way below the possible one metre (3.3 feet) tsunami that the Japan Meteorological Agency (JMA) warned could hit.

Waves of up to 10 centimetres were recorded along other parts of the coastline of Iwate prefecture.

Aerial footage showed no perceptible rise in sea levels along the coast. There was no visible change at the ports in the area, where broadcaster NHK has cameras permanently stationed.

The JMA said the 6.9 magnitude tremor struck at 8:06 am in the Pacific some 210 kilometres (130 miles) east of Miyako, at a depth of 10 kilometres.

An official told a Tokyo news conference that geologists regard the quake as an aftershock of the 2011 earthquake.

The US Geological Survey put the magnitude at 6.7.

Another quake measuring magnitude 5.8 struck in the Pacific off Iwate Tuesday afternoon, the USGS said. No tsunami warning was raised.

As soon as the morning quake hit, Japan's well-tested system of public alerts sprang into action, with NHK giving blanket coverage.

Announcers urged viewers to seek safety on higher ground and warned against going to the shore to watch for possible effects.

Public address systems all along the coast also broadcast warnings, while emergency vehicles patrolled with their sirens blaring, as announcements told people to find refuge.

   'Second wave could be higher' 

 "So far we have seen a minor tsunami but we continue to warn our citizens not to approach the coast as second and third waves could be higher," said Masayuki Yamazaki, an official in the anti-disaster office in Miyako.

Another Miyako official said: "The quake was strong and shook buildings but we have not heard of any damage."

Local authorities in Iwate issued evacuation advisories to more than 19,000 people, NHK reported.

Large areas of the coastline covered by the advisory were wiped out by the 2011 quake and tsunami, which triggered a nuclear accident in Fukushima.

The 9.0 undersea quake set off a massive tsunami that swamped cooling systems at the Fukushima Daiichi power plant, sparking the worst atomic accident in a generation.

Hundreds of thousands of people were evacuated around the plant amid fears of rising radiation, with many still unable to return to their homes.

The disaster, whose fourth anniversary falls on March 11, looms large in the Japanese psyche. The devastation and loss of life that it wrought reinforcing the country's natural cautiousness in the face of danger.

Japan is hit by around a fifth of the world's most powerful quakes every year due to its position at the conjunction of several tectonic plates.

Long experience has left it with strict building codes, such that powerful earthquakes that might raze cities in other countries tend to do little damage.


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