Study: Japanese tsunami was 23 metres high
A study has revealed that the tsunami which devastated Japan last week was at least 23 metres high.
Japan's biggest-ever tsunami was recorded at 38.2m high when a massive earthquake struck back in 1896.
However, an official said that without the coastal levee that did not exist in 1896, last Friday's tsunami was likely to have been the biggest ever to hit Japan.
Meanwhile, the UN Atomic Agency has said conditions at the badly damaged Fukushima nuclear power plant in Japan are grave, but not deteriorating badly.
The statement was made after Japanese engineers conceded that burying the plant in sand
and concrete may be a last resort to prevent a large radiation release.
Earlier today, Japan's nuclear safety agency raised the rating of the country's nuclear accident from four to five on a seven-level international scale of atomic accidents.
The scale defines a level four incident as having local consequences and a level five incident as having wider consequences.
However, Climate change campaigner John Gibbons said Ireland faces no real risk of exposure to radiation.
