The findings are backed by a study by Kazuhiko Fukuda of Fukushima University in Japan.
日本福岛大学福田一彦博士的一项研究支持了这些发现。
Tokyo Electric Power Co. said that operations at nuclear power plants in Fukushima were not affected, Japan's national Kyodo News Agency said.
据日本国家共同社报道,东京电力公司表示,在福岛县的核电厂运作正常,并不受地震影响。