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information about Fukushima published in English in Japanese media info publiée en anglais dans la presse japonaise

New method for assessing dangers of active faults

August 19, 2016

New method to predict danger of active faults





Japanese government experts say they will adopt a new method of assessing the probability that the country's main active faults will cause large-scale earthquakes.

A government task force for earthquake research made the decision on Friday.

Under the new method, 97 main active faults in and around the country will be ranked on a 4 level scale.

The highest rank of S means the probability of the fault causing a large-scale earthquake within 30 years is 3 percent or greater.

The rank of A refers to the probability of 0.1 percent to smaller than 3 percent. The rank of Z shows the chance of less than 0.1 percent.

The rank of X means that the probability is unclear but that the chance of a fault causing a jolt in the near future cannot be ruled out.

Some experts have suggested that the conventional method may mislead people about the probability of a fault line causing a major earthquake.


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