On July 16, 2007, a 6.8 magnitude earthquake rattled the world’s largest nuclear power complex at Kashiwazaki-Kariwa in Niigata Prefecture. This was on a site that the government and Tokyo Electric Power Co. had insisted was seismically safe.
Two years earlier, the Tokyo High Court had ruled against local plaintiffs backed by scientists who insisted the authorities were wrong and that there was an active fault line adjacent to the site. In 2007, Mother Nature overruled the judge, raising questions about relying on old evaluations by institutions favoring nuclear energy in assessing site safety, particularly given subsequent advancements in seismic science.
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